Это с их стороны10:09:06.001 5 SMTP-090261(dob.kaluga.ru) processing
10:09:06.061 5 SMTP-090261(dob.kaluga.ru) 1 relay(s) found:dob.kaluga.ru
10:09:06.061 4 SMTP-090261(dob.kaluga.ru) resolving 'dob.kaluga.ru'
10:09:06.120 4 SMTP-090261(dob.kaluga.ru) connecting [0.0.0.0]:0 -> [62.148.148.92]:25
10:09:06.174 3 SMTP-090261(dob.kaluga.ru) failed to connect to dob.kaluga.ru: [0.0.0.0]:0 -> [62.148.148.92]:25. Error Code=connection refused
10:09:06.174 4 SMTP(dob.kaluga.ru) re-enqueue
10:09:06.174 5 SMTP waiting: dob.kaluga.ru active:
10:09:06.174 5 SMTP(dob.kaluga.ru) is first in queue with 30 second(s) delay
10:09:06.174 4 SMTP-090261(dob.kaluga.ru) releasing stream
10:09:06.174 5 SMTP waiting(get): dob.kaluga.ru active:
10:09:06.174 5 SMTP(dob.kaluga.ru) is first in queue with 30 second(s) delay
[root@mail SystemLogs]$ dig dob.kaluga.ru mx
; <<>> DiG 9.11.20-RedHat-9.11.20-5.el8_3.1 <<>> dob.kaluga.ru mx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65253
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;dob.kaluga.ru. IN MX
;; ANSWER SECTION:
dob.kaluga.ru. 3599 IN MX 10 dob.kaluga.ru.
;; Query time: 156 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri May 28 10:29:16 MSK 2021
;; MSG SIZE rcvd: 58
[root@mail SystemLogs]$ telnet dob.kaluga.ru 25
Trying 62.148.148.92...
telnet: connect to address 62.148.148.92: Connection refused
[root@mail SystemLogs]$ nslookup dob.kaluga.ru
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
Name: dob.kaluga.ru
Address: 62.148.148.92