Проверка почтового сервера

-> Connect to voltag.su:25
220 mx Kerio Connect 10.0.6 ESMTP ready
-> EHLO uptimebot.ru
250-mx
250-AUTH CRAM-MD5 PLAIN LOGIN DIGEST-MD5 NTLM
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-PIPELINING
250-ETRN
250-DSN
250 HELP
### STARTTLS found ###
-> STARTTLS
### STARTTLS started ok ###
-> EHLO uptimebot.ru
250-mx
250-AUTH CRAM-MD5 PLAIN LOGIN DIGEST-MD5 NTLM
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-PIPELINING
250-ETRN
250-DSN
250 HELP
-> quit
221 2.0.0 SMTP closing connection

Subject CN: mx.voltag.su
SubjectAltName: DNS:mx.voltag.su
Valid from: 2025-07-01 09:25:33
Valid to: 2025-09-29 09:25:32
Issuer CN: R11

Subject CN: R11
Valid from: 2024-03-13 03:00:00
Valid to: 2027-03-13 02:59:59
Issuer CN: ISRG Root X1