Replies: 0
For some reason the mail test fails if option is set to TLS (port 587), but works fine with option SSL (port 465) – all other settings are the same including authentication credentials. Also TLS connection on port 587 is working fine when using some other mail clients, i.e. Thunderbird, etc.
I can continue using SSL at port 465, but I would prefer to use TLS at 587 and I am at a loss how it can be fixed – probably there is some simple way to fix it, please advise.
Here is the failed attempt log:
Versions: WordPress: 5.5.1 WordPress MS: No PHP: 7.4.10 WP Mail SMTP: 2.4.0
Params: Mailer: smtp Constants: No ErrorInfo: SMTP Error: Could not connect to
SMTP host. Host: smtp.nuramed.ru Port: 587 SMTPSecure: tls SMTPAutoTLS:
bool(true) SMTPAuth: bool(true)
Server: OpenSSL: OpenSSL 1.0.2k 26 Jan 2017 Apache.mod_security: No
Debug: Mailer: Прочие SMTP SMTP Error: Could not connect to SMTP host.
SMTP Debug:
2020-09-21 02:28:26 Connection: opening to smtp.domain-name:587, timeout=300,
options=array()
2020-09-21 02:28:26 Connection: opened
2020-09-21 02:28:26 SERVER -> CLIENT: 220 thokk.from.sh
2020-09-21 02:28:26 CLIENT -> SERVER: EHLO domain-name
2020-09-21 02:28:26 SERVER -> CLIENT: 250-thokk.from.sh Hello domain-name
[x.x.x.x]250-SIZE 52428800250-8BITMIME250-AUTH PLAIN LOGIN250-STARTTLS250
HELP
2020-09-21 02:28:26 CLIENT -> SERVER: STARTTLS
2020-09-21 02:28:26 SERVER -> CLIENT: 220 TLS go ahead
2020-09-21 02:28:26 Connection failed. Error #2: stream_socket_enable_crypto():
Peer certificate CN=from.sh' did not match expected CN=smtp.domain-name’
[…/public_html/wp/wp-includes/PHPMailer/SMTP.php
line 426]
SMTP Error: Could not connect to SMTP host.
2020-09-21 02:28:26 CLIENT -> SERVER: QUIT
2020-09-21 02:28:26
2020-09-21 02:28:26
2020-09-21 02:28:26 Connection: closed
SMTP Error: Could not connect to SMTP host.