Большую часть времени сервер работает нормально: письма уходят и прходят, жалоб не получаем.
Однако раз в неделю получаю вот такое:
List of errors
--------------

    2 aaaaappp@adeslas.es F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<aaaaappp@adeslas.es>:
        host smtp.adeslas.es [88.84.71.20]: 550 recipient <aaaaappp@adeslas.es>
        was not found in LDAP server -

    2 ard@gruposancayetano.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<ard@gruposancayetano.com>:
        host correo.gruposancayetano.com [62.81.252.111]: 550
        5.1.1 User unknown

    1 batery@wanadooadsl.net F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<batery@wanadooadsl.net>:
        host inw.wanadoo.es [62.36.20.20]: 550 Account disabled
        / El usuario esta en estado: inactivo

    1 bmoon@chih1.telmex.net.mx F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<bmoon@chih1.telmex.net.mx>:
        host smtp2.prodigy.net.mx [148.235.52.55]: 550 #5.1.0
        Address rejected bmoon@chih1.telmex.net.mx

    1 codependencyxzd@gmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<codependencyxzd@gmail.com>:
        host gmail-smtp-in.l.google.com [66.249.93.114]: 550-5.1.1
        The email account that you tried to reach does not
        exist. Please\n550-5.1.1 try double-checking the recipient's
        email address for typos\n550-5.1.1 or unnecessary spaces.
        Learn more at\n550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596
        x26si2962343ugc.9

    1 codependencyxzd@gmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<codependencyxzd@gmail.com>:
        host gmail-smtp-in.l.google.com [66.249.93.27]: 550-5.1.1
        The email account that you tried to reach does not
        exist. Please\n550-5.1.1 try double-checking the recipient's
        email address for typos\n550-5.1.1 or unnecessary spaces.
        Learn more at\n550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596
        e23si6232310ugd.46

    2 cosas@mixmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<cosas@mixmail.com>:
        host ing.wanadoo.es [62.36.20.73]: 550 Relay not permitted
        / No such user

    2 dario_86@uol.com.ar F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<dario_86@uol.com.ar>:
        host mx-uolar.uol.com.br [200.221.0.2]: 550 <dario_86@uol.com.ar>:
        Recipient address rejected: User unknown in relay recipient table

    1 drgabrielmwenza@yahoo.es F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after end of data:
        host mx1.mail.eu.yahoo.com [217.12.11.64]: 554 delivery
        error: dd This user doesn't have a yahoo.es account
        (drgabrielmwenza@yahoo.es) [0] - mta157.mail.ukl.yahoo.com

    1 etyvsqre@bno.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<etyvsqre@bno.com>:
        host aspmx.l.google.com [194.85.88.226]: 591 etyvsqre@bno.com
        You must authenticate first.

    1 etyvsqre@bno.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<etyvsqre@bno.com>:
        host aspmx.l.google.com [194.85.88.231]: 591 etyvsqre@bno.com
        You must authenticate first.

    2 fernsehen.geisel@libreopinion.com F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        pipelined DATA: host mx.libreopinion.com [190.210.9.102]:
        533 demasiados usuarios de correo desconocidos (#5.3.3)

    1 heyuu@bodyfields.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<heyuu@bodyfields.com>:
        host smtp.where.secureserver.net [208.109.80.149]:
        550 sorry, mail to that recipient is not accepted (#5.7.1)

    1 heyuu@bodyfields.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<heyuu@bodyfields.com>:
        host smtp.where.secureserver.net [64.202.166.12]: 550
        sorry, mail to that recipient is not accepted (#5.7.1)

    1 hmxuxbp@brandolinicompanies.com F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<hmxuxbp@brandolinicompanies.com>: host brandolinicompanies.com.s6a1.psmtp.com
        [64.18.5.10]: 550 No such user - psmtp

    1 kicfarriermarinedoh@farriermarine.com F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<kicfarriermarinedoh@farriermarine.com>: host
        mx1.biz.mail.yahoo.com [209.191.89.172]: 550 relaying
        denied for <kicfarriermarinedoh@farriermarine.com>

    1 kicfarriermarinedoh@farriermarine.com F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<kicfarriermarinedoh@farriermarine.com>: host
        mx1.biz.mail.yahoo.com [4.79.181.18]: 550 relaying
        denied for <kicfarriermarinedoh@farriermarine.com>

    2 kying@ecolaire.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<kying@ecolaire.com>:
        host correo.iservicesmail.com [217.130.24.40]: 550
        #5.1.0 Address rejected kying@ecolaire.com

    2 lihfelixcabrerajet@felixcabrera.com F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<lihfelixcabrerajet@felixcabrera.com>: host
        mail.felixcabrera.com [64.176.236.125]: 550 5.1.1 <lihfelixcabrerajet@felixcabrera.com>...
        User unknown CRBL

    2 lihfermejet@ferme.de F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<lihfermejet@ferme.de>:
        host smtp-01.tld.t-online.de [194.25.134.76]: 550 5.1.1
        user unknown

    1 narcoticii20@gmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<narcoticii20@gmail.com>:
        host gmail-smtp-in.l.google.com [66.249.93.27]: 550-5.1.1
        The email account that you tried to reach does not
        exist. Please\n550-5.1.1 try double-checking the recipient's
        email address for typos\n550-5.1.1 or unnecessary spaces.
        Learn more at\n550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596
        o24si5624537ugd.31

    1 narcoticii20@gmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<narcoticii20@gmail.com>:
        host gmail-smtp-in.l.google.com [66.249.93.27]: 550-5.1.1
        The email account that you tried to reach does not
        exist. Please\n550-5.1.1 try double-checking the recipient's
        email address for typos\n550-5.1.1 or unnecessary spaces.
        Learn more at\n550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596
        q1si5768065uge.23

    4 order+caf_=audio=domain1.ru@domain2.ru F=<> P=<>
        R=dnslookup T=remote_smtp: SMTP error from remote mail
        server after RCPT TO:<order+caf_=audio=domain1.ru@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order+caf_=audio=domain1.ru@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<aaaaappp@adeslas.es>
        P=<aaaaappp@adeslas.es> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<ard@gruposancayetano.com>
        P=<ard@gruposancayetano.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<billy_27@latinmail.com>
        P=<billy_27@latinmail.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<bmoon@chih1.telmex.net.mx>
        P=<bmoon@chih1.telmex.net.mx> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<burnett@bachiller.com>
        P=<burnett@bachiller.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<cixnp@bostoninteriors.com>
        P=<cixnp@bostoninteriors.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<codependencyxzd@gmail.com>
        P=<codependencyxzd@gmail.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<cosas@mixmail.com>
        P=<cosas@mixmail.com> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<dario_86@uol.com.ar>
        P=<dario_86@uol.com.ar> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<drgabrielmwenza@yahoo.es>
        P=<drgabrielmwenza@yahoo.es> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<etyvsqre@bno.com>
        P=<etyvsqre@bno.com> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<fernsehen.geisel@libreopinion.com>
        P=<fernsehen.geisel@libreopinion.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<gazette@fremontcasinos.com>
        P=<gazette@fremontcasinos.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<gustacero2000@yahoo.es>
        P=<gustacero2000@yahoo.es> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<heyuu@bodyfields.com>
        P=<heyuu@bodyfields.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<hmxuxbp@brandolinicompanies.com>
        P=<hmxuxbp@brandolinicompanies.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<iipopry@bonniestjohn.com>
        P=<iipopry@bonniestjohn.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<irina.borisova@inbox.ru>
        P=<irina.borisova@inbox.ru> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<kerrym@bvl.com.pe>
        P=<kerrym@bvl.com.pe> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<kicfarriermarinedoh@farriermarine.com>
        P=<kicfarriermarinedoh@farriermarine.com> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<order@domain2.ru>: host aspmx.l.google.com
        [194.85.88.226]: 591 order@domain2.ru You must
        authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<kying@ecolaire.com>
        P=<kying@ecolaire.com> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<lihfelixcabrerajet@felixcabrera.com>
        P=<lihfelixcabrerajet@felixcabrera.com> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<order@domain2.ru>: host aspmx.l.google.com
        [194.85.88.231]: 591 order@domain2.ru You must
        authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<lihfermejet@ferme.de>
        P=<lihfermejet@ferme.de> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<mtdovs@boothuggers.com>
        P=<mtdovs@boothuggers.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<narcoticii20@gmail.com>
        P=<narcoticii20@gmail.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<njfvobh@blessmark.com>
        P=<njfvobh@blessmark.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<olga@sarenet.es>
        P=<olga@sarenet.es> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<order+caf_=audio=domain1.ru@domain2.ru>
        P=<order+caf_=audio=domain1.ru@domain2.ru> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<order@domain2.ru>: host aspmx.l.google.com
        [194.85.88.226]: 591 order@domain2.ru You must
        authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<order+caf_=audio=domain1.ru@domain2.ru>
        P=<order+caf_=audio=domain1.ru@domain2.ru> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<order@domain2.ru>: host aspmx.l.google.com
        [194.85.88.231]: 591 order@domain2.ru You must
        authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<palma@entelchile.net>
        P=<palma@entelchile.net> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<qknrw@bluecoilspring.com>
        P=<qknrw@bluecoilspring.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<rbatifljfosl@bluecube-uk.com>
        P=<rbatifljfosl@bluecube-uk.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<reliedqac55@gmail.com>
        P=<reliedqac55@gmail.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<sacoroto@eresmas.com>
        P=<sacoroto@eresmas.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<steeevsg@boundtotravel.com>
        P=<steeevsg@boundtotravel.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<teenentander@icqmail.com>
        P=<teenentander@icqmail.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<tega26@icqmail.com>
        P=<tega26@icqmail.com> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<tej@q-00-p.com>
        P=<tej@q-00-p.com> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<tenaud@grics.qc.ca>
        P=<tenaud@grics.qc.ca> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<tenishan@teccart.qc.ca>
        P=<tenishan@teccart.qc.ca> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<teque@libero.it>
        P=<teque@libero.it> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<ter19a@icqmail.com>
        P=<ter19a@icqmail.com> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<ucnvx@brainplan.com>
        P=<ucnvx@brainplan.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<webpronews@ientrynetwork.net>
        P=<webpronews@ientrynetwork.net> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<xcsr@blue-ribbon1.com>
        P=<xcsr@blue-ribbon1.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<|atus@ebay.com.au>
        P=<|atus@ebay.com.au> R=dnslookup T=remote_smtp: SMTP
        error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<|barr_philipfreeman@excite.com>
        P=<|barr_philipfreeman@excite.com> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<|bj@caverock.net.nz>
        P=<|bj@caverock.net.nz> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.231]: 591 order@domain2.ru
        You must authenticate first.

    1 order@domain2.ru <audio@domain1.ru> F=<|catherine.offler@adelaide.edu.au>
        P=<|catherine.offler@adelaide.edu.au> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<order@domain2.ru>:
        host aspmx.l.google.com [194.85.88.226]: 591 order@domain2.ru
        You must authenticate first.

    1 qknrw@bluecoilspring.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<qknrw@bluecoilspring.com>:
        host smtp.where.secureserver.net [208.109.80.149]:
        550 sorry, mail to that recipient is not accepted (#5.7.1)

    1 qknrw@bluecoilspring.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<qknrw@bluecoilspring.com>:
        host smtp.where.secureserver.net [64.202.166.12]: 550
        sorry, mail to that recipient is not accepted (#5.7.1)

    1 reliedqac55@gmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<reliedqac55@gmail.com>:
        host gmail-smtp-in.l.google.com [66.249.93.114]: 550-5.1.1
        The email account that you tried to reach does not
        exist. Please\n550-5.1.1 try double-checking the recipient's
        email address for typos\n550-5.1.1 or unnecessary spaces.
        Learn more at\n550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596
        w40si2804430ugc.6

    1 reliedqac55@gmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<reliedqac55@gmail.com>:
        host gmail-smtp-in.l.google.com [66.249.93.27]: 550-5.1.1
        The email account that you tried to reach does not
        exist. Please\n550-5.1.1 try double-checking the recipient's
        email address for typos\n550-5.1.1 or unnecessary spaces.
        Learn more at\n550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596
        e1si5627315ugf.7

    2 steeevsg@boundtotravel.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<steeevsg@boundtotravel.com>:
        host inbound.registeredsite.com [64.224.219.122]: 550
        5.0.0 <steeevsg@boundtotravel.com>... User unknown

    1 tega26@icqmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<tega26@icqmail.com>:
        host mailin-04.mx.aol.com [64.12.138.57]: 550 MAILBOX NOT FOUND

    2 tenishan@teccart.qc.ca F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after MAIL FROM:<>
        SIZE=3089: host aadmx2.aadmtl.com [67.226.185.80]:
        550 Sender address must be specified.

    1 ter19a@icqmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<ter19a@icqmail.com>:
        host mailin-02.mx.aol.com [64.12.137.89]: 550 MAILBOX NOT FOUND

    1 ter19a@icqmail.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<ter19a@icqmail.com>:
        host mailin-02.mx.aol.com [64.12.138.120]: 550 MAILBOX NOT FOUND

    2 ucnvx@brainplan.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<ucnvx@brainplan.com>:
        host mail.webpage.t-com.de [80.152.31.131]: 550 Invalid
        recipient: <ucnvx@brainplan.com>

    1 xcsr@blue-ribbon1.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<xcsr@blue-ribbon1.com>:
        host mg.drive.ne.jp [202.152.209.9]: 550 5.2.1 <xcsr@blue-ribbon1.com>...
        Mailbox disabled for this recipient

    1 xcsr@blue-ribbon1.com F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<xcsr@blue-ribbon1.com>:
        host mg.drive.ne.jp [61.204.245.109]: 550 5.2.1 <xcsr@blue-ribbon1.com>...
        Mailbox disabled for this recipient

    2 |barr_philipfreeman@excite.com F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<|barr_philipfreeman@excite.com>: host mail-in.roc2.bluetie.com
        [208.89.132.202]: 550 5.1.1 <|barr_philipfreeman@excite.com>:
        Recipient address rejected: User unknown in virtual alias table

    2 |bj@caverock.net.nz F=<> P=<> R=dnslookup T=remote_smtp:
        SMTP error from remote mail server after RCPT TO:<|bj@caverock.net.nz>:
        host mx.caverock.net.nz [202.37.101.29]: 550 <|bj@caverock.net.nz>:
        Recipient address rejected: User unknown in virtual mailbox table

    2 |catherine.offler@adelaide.edu.au F=<> P=<> R=dnslookup
        T=remote_smtp: SMTP error from remote mail server after
        RCPT TO:<|catherine.offler@adelaide.edu.au>: host mx-02.adelaide.edu.au
        [192.43.228.206]: 550 #5.1.0 Address rejected |catherine.offler@adelaide.edu.au