Проверка почтового сервера

-> Connect to mail.9ranks.ru:25
220-mail.ppltd.ru ESMTP Postfix
220 mail.ppltd.ru ESMTP Postfix
-> EHLO uptimebot.ru
250-mail.ppltd.ru
250-PIPELINING
250-SIZE 1073741824
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 SMTPUTF8
### STARTTLS found ###
-> STARTTLS
### STARTTLS started ok ###
-> EHLO uptimebot.ru
250-mail.ppltd.ru
250-PIPELINING
250-SIZE 1073741824
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 SMTPUTF8
-> quit
221 2.0.0 Bye

Subject CN: mail.ppltd.ru
SubjectAltName: DNS:m.ppltd.ru, DNS:mail.ppltd.ru
Valid from: 2026-03-09 20:57:22
Valid to: 2026-06-07 20:57:21
Issuer CN: R12

Subject CN: R12
Valid from: 2024-03-13 03:00:00
Valid to: 2027-03-13 02:59:59
Issuer CN: ISRG Root X1