Проверка почтового сервера

-> Connect to ssl://smtp.yandex.ru:465
220 mail-nwsmtp-smtp-production-main-95.vla.yp-c.yandex.net Ok 1752527186-Q6Sm2M5MIW20
-> EHLO uptimebot.ru
250-mail-nwsmtp-smtp-production-main-95.vla.yp-c.yandex.net
250-8BITMIME
250-PIPELINING
250-SIZE 53477376
250-STARTTLS
250-AUTH LOGIN PLAIN XOAUTH2
250-DSN
250 ENHANCEDSTATUSCODES
-> quit
221 2.0.0 Closing connecton

Subject CN: smtp.yandex.ru
SubjectAltName: DNS:smtp.yandex.ru, DNS:smtp.yandex.com.tr, DNS:smtp.ya.ru, DNS:smtp.yandex.kz, DNS:smtp.yandex.com, DNS:smtp.yandex.by
Valid from: 2025-05-19 09:01:42
Valid to: 2025-11-16 23:59:59
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: 2018-09-19 03:00:00
Valid to: 2028-01-28 15:00:00
Issuer CN: GlobalSign Root CA