Проверка почтового сервера

-> Connect to mail.ppltd.ru:587
220 mail.ppltd.ru ESMTP Postfix
-> EHLO uptimebot.ru
250-mail.ppltd.ru
250-PIPELINING
250-SIZE 1073741824
250-ETRN
250-STARTTLS
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: 2025-06-20 10:39:24
Valid to: 2025-09-18 10:39:23
Issuer CN: R10

Subject CN: R10
Valid from: 2024-03-13 03:00:00
Valid to: 2027-03-13 02:59:59
Issuer CN: ISRG Root X1