Проверка почтового сервера

-> Connect to ip.esphere.ru:25
220 ip.esphere.ru ESMTP Postfix (Ubuntu)
-> EHLO uptimebot.ru
250-ip.esphere.ru
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 CHUNKING
### STARTTLS found ###
-> STARTTLS
### STARTTLS started ok ###
-> EHLO uptimebot.ru
250-ip.esphere.ru
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 CHUNKING
-> quit
221 2.0.0 Bye

Subject CN: *.esphere.ru
SubjectAltName: DNS:*.esphere.ru, DNS:esphere.ru
Valid from: 2025-04-25 17:01:47
Valid to: 2026-05-27 17:01:46
Issuer CN: GlobalSign RSA OV SSL CA 2018

Subject CN: GlobalSign RSA OV SSL CA 2018
Valid from: 2018-11-21 03:00:00
Valid to: 2028-11-21 03:00:00
Issuer CN: GlobalSign

Subject CN: GlobalSign
Valid from: 2009-03-18 13:00:00
Valid to: 2029-03-18 13:00:00
Issuer CN: GlobalSign