I think this Selinux command fixed it after updating PHPmailer.

Kevin wrote: I uncommented if(!$sent) var_dump($maildebug); in application/helpers/common_helper.php

I got this message! This will be a huge help!

Argl … you can have this message with mail SMTP debug mode …

I think this Selinux command fixed it after updating PHPmailer.

Great !

Old thread i knw,

But this may help someone facing similar issue on version 3.0+

Set debug as 1 in config.php

now open limesurvey\applications\helpers\common_helper.php


uncomment the below line to see the error received when sending SMTP email.

if(!$sent) var_dump($maildebug);

In the case where the mail admin provide the relaying service for a particular email ID, which does not require password to be entered in order to send the email.

This is where the problem happens.

As Limesurvey will expect that once a email username is added by the admin a password will be supplied too.

In order to take care of above.

comment the following line in the same file
$mail->SMTPAuth = true;

commenting this line will bypass the password verification.

Hope this helps other facing similar challenges.