Problem sending emails via smtp

[Marks]

PHPMailer has the following error when trying to send email via the hosting account:
SMTP connect() failed

But when sending by the same script through my localhost WAMP server, it sends normally.

Through exim maillog I have the following errors:
2021-10-05 19:19:03 TLS error on connection from XXXX.XXX.X (WEBSITE.COM) [IP.IP.IP.IP.] (SSL_accept): NULL (TLSv1)

and also

SSL_accept (TLSv1)): error:14209102:SSL routines:tls_early_post_process_client_hello:unsupported protocol

host: mail.domain.com
port: 587
authentication: tls
email account username and password

 

[apogee]

its csf related, set an exception for the corresponding user and it works

 

[ikkeben]

VERSIONS an OS from all?
needed for support i think.
Can't help but without versions and which OS....

Crystal BALL...

 

[Marks]

Smtpblock is off

Debian 11

 

[dmtinc]

TLSv1 is obsolete(as sslv3), you need to use TLSv1.2 or TLSv1.3, you need to update your email client.

 

[Marks]

TLSv1 is obsolete(as sslv3), you need to use TLSv1.2 or TLSv1.3, you need to update your email client.

But I don't understand, why the local upload works and the server is not working, it displays the error.
ssl configuration is OLD in custombuild

 

[dmtinc]

You can try this:

in: (you can create the file if isnt exist)

/etc/exim.variables.conf.custom

add:

openssl_options=+no_sslv2 +no_sslv3
tls_require_ciphers=ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS

After that, rebuild the exim config

/usr/local/directadmin/custombuild/build exim_conf

 

[Marks]

You can try this:

in: (you can create the file if isnt exist)

/etc/exim.variables.conf.custom

add:

openssl_options=+no_sslv2 +no_sslv3
tls_require_ciphers=ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS

After that, rebuild the exim config

/usr/local/directadmin/custombuild/build exim_conf

did not work.
see the phpmailer return on the server

2021-10-06 12:10:39 SERVER -> CLIENT: 220 hostname ESMTP Exim 4.95 Wed, 06 Oct 2021 09:10:39 -0300
2021-10-06 12:10:39 CLIENT -> SERVER: EHLO domainclient.com
2021-10-06 12:10:39 SERVER -> CLIENT: 250-hostname Hello rDNS [IP.IP.IP.IP] 250-SIZE 52428800 250-8BITMIME 250-PIPELINING 250-PIPE_CONNECT 250-AUTH PLAIN LOGIN 250-STARTTLS 250 HELP
2021-10-06 12:10:39 CLIENT -> SERVER: STARTTLS
2021-10-06 12:10:39 SERVER -> CLIENT: 220 TLS go ahead
2021-10-06 12:10:39 SMTP Error: Could not connect to SMTP host.
2021-10-06 12:10:39 CLIENT -> SERVER: QUIT
2021-10-06 12:10:39 SERVER -> CLIENT: 221 hostname closing connection
2021-10-06 12:10:39 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

 

[dmtinc]

Try in phpmailer

$mail->SMTPDebug = true;

To get more information to compare with /var/log/exim/mainlog