Le log de Wp smtp mail indique :
Versions:
WordPress: 5.6
WordPress MS: No
PHP: 7.4.13
WP Mail SMTP: 2.5.1
Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: The following recipients failed:
daniel.ceranic@gmail.com: : Recipient address rejected: -5.1.1 the email account that you tried to reach does not exist. please try 550-5.1.1 double-checkin [0] (1608068706)
Host: smtp.franceserv.fr
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)
Server:
OpenSSL: OpenSSL 1.1.1d 10 Sep 2019
Debug:
Mailer: Autre SMTP
PHPMailer was able to connect to SMTP server but failed while trying to send an email.
Mailer: Autre SMTP
SMTP Error: The following recipients failed:
daniel.ceranic@gmail.com: : Recipient address rejected: -5.1.1 the email account that you tried to reach does not exist. please try 550-5.1.1 double-checkin [0] (1608068706)
SMTP Debug:
2020-12-16 13:42:21 Connection: opening to ssl://smtp.franceserv.fr:465, timeout=300, options=array()
2020-12-16 13:42:21 Connection: opened
2020-12-16 13:42:21 SERVER -> CLIENT: 220 mx.franceserv.fr ESMTP Postfix (Debian/GNU)
2020-12-16 13:42:21 CLIENT -> SERVER: EHLO danielceranic.tech
2020-12-16 13:42:21 SERVER -> CLIENT: 250-mx.franceserv.fr250-PIPELINING250-SIZE 52428800250-VRFY250-ETRN250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250-8BITMIME250-DSN250-SMTPUTF8250 CHUNKING
2020-12-16 13:42:21 CLIENT -> SERVER: AUTH LOGIN
2020-12-16 13:42:21 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2020-12-16 13:42:21 CLIENT -> SERVER: [credentials hidden]
2020-12-16 13:42:21 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2020-12-16 13:42:21 CLIENT -> SERVER: [credentials hidden]
2020-12-16 13:42:21 SERVER -> CLIENT: 235 2.7.0 Authentication successful
2020-12-16 13:42:21 CLIENT -> SERVER: MAIL FROM:<
webmaster@danielceranic.tech>
2020-12-16 13:42:21 SERVER -> CLIENT: 250 2.1.0 Ok
2020-12-16 13:42:21 CLIENT -> SERVER: RCPT TO:<
daniel.ceranic@gmail.com>
2020-12-16 13:42:22 SERVER -> CLIENT: 554 5.7.1 <
daniel.ceranic@gmail.com>: Recipient address rejected: -5.1.1 the email account that you tried to reach does not exist. please try 550-5.1.1 double-checkin [0] (1608068706)
2020-12-16 13:42:22 SMTP ERROR: RCPT TO command failed: 554 5.7.1 <
daniel.ceranic@gmail.com>: Recipient address rejected: -5.1.1 the email account that you tried to reach does not exist. please try 550-5.1.1 double-checkin [0] (1608068706)
2020-12-16 13:42:22 CLIENT -> SERVER: QUIT
2020-12-16 13:42:22 SERVER -> CLIENT: 221 2.0.0 Bye
2020-12-16 13:42:22 Connection: closed
SMTP Error: The following recipients failed:
daniel.ceranic@gmail.com: <
daniel.ceranic@gmail.com>: Recipient address rejected: -5.1.1 the email account that you tried to reach does not exist. please try 550-5.1.1 double-checkin [0] (1608068706)