yvonneosawa

Hi @Nukak Asanansi

Versions:
WordPress: 6.4.1
WordPress MS: No
PHP: 8.1.24
WP Mail SMTP: 3.10.0

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): Peer certificate CN=altar37.supremepanel37.com' did not match expected CN=smtp.office365.com'SMTP server error: QUIT command failed Detail: ??/?Z?$!x ?F{?? Ud#B221 altar37.supremepanel37.com closing connection
Host: smtp.office365.com
Port: 587
SMTPSecure:tls
SMTPAutoTLS:bool(true)
SMTPAuth:bool(true)

Server:
OpenSSL: OpenSSL 1.1.1w 11 Sep 2023
Apache.mod_security: No

Debug:
Email Source: WP Core Mailer: Other SMTP SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): Peer certificate CN=altar37.supremepanel37.com' did not match expected CN=smtp.office365.com'SMTP server error: QUIT command failed Detail:

SMTP Debug:
2023-11-17 08:51:18 Connection: opening to smtp.office365.com:587, timeout=300, options=array()
2023-11-17 08:51:18 Connection: opened
2023-11-17 08:51:18 SERVER -> CLIENT: 220-altar37.supremepanel37.com ESMTP Exim 4.96.2 #2 Fri, 17 Nov 2023 08:51:18 +0000 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.
2023-11-17 08:51:18 CLIENT -> SERVER: EHLO www.isteducation.com
2023-11-17 08:51:18 SERVER -> CLIENT: 250-altar37.supremepanel37.com Hello www.isteducation.com [198.23.59.208]250-SIZE 52428800250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH PLAIN LOGIN250-STARTTLS250 HELP
2023-11-17 08:51:18 CLIENT -> SERVER: STARTTLS
2023-11-17 08:51:18 SERVER -> CLIENT: 220 TLS go ahead
2023-11-17 08:51:18 Connection failed. Error #2: stream_socket_enable_crypto(): Peer certificate CN=altar37.supremepanel37.com' did not match expected CN=smtp.office365.com' [/home/isteduca/public_html/wp-includes/PHPMailer/SMTP.php line 476]
SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): Peer certificate CN=altar37.supremepanel37.com' did not match expected CN=smtp.office365.com'
2023-11-17 08:51:18 CLIENT -> SERVER: QUIT
2023-11-17 08:51:18
2023-11-17 08:51:18
2023-11-17 08:51:18 Connection: closed
SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): Peer certificate CN=altar37.supremepanel37.com' did not match expected CN=smtp.office365.com'