Email DSN - Relay server error

Product Support
1

Your software
My Mautic version is:
5.1
My PHP version is:

PHP Version 8.1.28

My Database type and version is:
mysql:8.0

Your problem

I want to use our relay server for sending emails.
We use the port 25 and no connection security. No username or password.
I managed to add in Email DSN the following
smtp://smtprelay.myorg.com:25?encryption=none

These errors are showing in the log:
Unable to connect with STARTTLS: stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Steps I have tried to fix the problem:

I have added in Email DSN Options:
encryption none, so I have ?encryption=none

I also tried to add to local.php:
‘mailer_encryption’ => ‘none’,
‘mailer_auth_mode’ => ‘none’,

2

Does the mail server even allow to connect without encryption?

3

Hi,

Yes, connection is allowed on IP bases.

4

Hello!

Can you try to turn off TLS, since it’s enabled by default in SMTP.
Use the verify peer setting in your DSN

verify_peer=0
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