There was an unexpected problem communicating with SMTP: Unexpected return code - Expected: 235, Got: 535 | 535 5.7.8 Error: authentication failed: Invalid user or password! 1758049312-q1WkMO1LxOs0

SMTP log:

Set: the server
Set: the auth
Set: a message will be sent
Connecting to smtp.yandex.ru at 465
Got: 220 mail-nwsmtp-smtp-production-main-95.klg.yp-c.yandex.net Ok 1758049312-q1WkMO1LxOs0
Sent: EHLO svrm.avmas.ru
Got: 250-mail-nwsmtp-smtp-production-main-95.klg.yp-c.yandex.net
Got: 250-8BITMIME
Got: 250-PIPELINING
Got: 250-SIZE 53477376
Got: 250-STARTTLS
Got: 250-AUTH LOGIN PLAIN XOAUTH2
Got: 250-DSN
Got: 250 ENHANCEDSTATUSCODES
Sent: AUTH LOGIN
Got: 334 VXNlcm5hbWU6
Sent: d2lraWFkbWluQGF2bWFzLnJ1
Got: 334 UGFzc3dvcmQ6
Sent: d3lqY3V2cmZ2Y2xmb3FvZA==
Got: 535 5.7.8 Error: authentication failed: Invalid user or password! 1758049312-q1WkMO1LxOs0

Above may contain passwords - do not post online!