> Applicable snippets from files are:
>
> My main.cf
>
>
> content_filter=smtp-amavis:[127.0.0.1]:10024 meta_directory = /etc/postfix
>
> smtp_tls_security_level = may
> smtpd_tls_security_level = may
>
>
>
> I did this to master.cf
>
> 127.0.0.1:2510 inet n - n - - smtpd
> -o syslog_name=postfix/submission
> -o smtpd_tls_security_level=encrypt
> -o smtpd_sasl_auth_enable=yes
> -o smtpd_client_restrictions=permit_sasl_authenticated
> -o milter_macro_daemon_name=ORIGINATING
> -o content_filter=
check if those lines are beginning with whitespace (tab/space):
127.0.0.1:2510 inet n - n - - smtpd
-o syslog_name=postfix/submission
-o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated
-o milter_macro_daemon_name=ORIGINATING
-o content_filter=
Depending on the mail-/logvolume on the server you might temporarily
set " -o syslog_name=postfix/submission2510" to distinguish
submission (587) and submission (2510).
> My PHPList config.php file shows
>
> define('PHPMAILERHOST', '127.0.0.1');
> define('PHPMAILERPORT',2510);
> define('PHPMAILER_SECURE',true);
If connections are originating from localhost only, you don't
need encryption (PHPMAILER_SECURE / "-o smtpd_tls_security_level=encrypt").
With encryption you need to check if PHPMAILER verifies certificates
and if verification is successful. Usually this requires a certificate
signed by a certification authority like letsencrypt. Self-signed
certificates can be problematic in this context.
> Apr 25 08:52:08 mcq postfix/submission/smtpd[18972]: lost connection after
> STARTTLS from localhost[127.0.0.1]
This might be a hint that validation is not successful - PHPMAILER drops the
connection.
Perhaps you can enable a debug log in PHPMAILER for more information.
Best regards,
Gerald
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