Implement SMTP authentication type

Sorry for not responding sooner.
I don't know if this is still a problem, but here are my observations:

• The differences between beta2 abd beta3 should not affect normal operations, since it was only updating a composer.json file: https://www.drupal.org/project/phpmailer/releases/7.x-3.0-beta3
• The provided debug file seems to have binary characters at the point where the error message is, so I cannot see what the server reported the problem as.
• Based on what I can see in the debug file, it looks like it might possibly have timed out.

Let me know if this is still a problem for you or not, and if so, please try to provide the actual message in plain text, so that I can see what it says.
Thank you.

Hi there. Sorry for hijacking this issue, I'm having a similar problem and even if after reading the debug messages in the above post I realize the source of the issue I'm facing is not exactly the same, I wanted to share my findings.

I'm having an "SMTP Authentication failed" message every single time I try to send emails, when obviously all the SMTP settings (including username and password) are correct. After checking the debug messages, there's always an error SMTP ERROR Username command failed: 535 5.7.8 at the end of the logs.

A quick search revealed a possible solution here and here, by adding $mail->AuthType = 'LOGIN'; when configuring the PHPMailer class.

So I did a quick test adding $this->AuthType = 'LOGIN'; to the line #76 in phpmailer/includes/phpmailer.class.inc and voilà, everything is now working flawlessly.

From what I read in the linked posts, it seems necessary to set the AuthType property whe using versions >= 5.2.25 of the PHPMailer library, so you may want to take a look at it.

Thank you for the information @Proteo. It is curious to me why that was not included already, but it may be because the PHPMailer library does a descent job of guessing it, that it wasn't needed for most situations.

Attached is a patch that addresses the issue.
@Proteo, if you can test it and let me know if it still works for you, that would be great.

Hi @oadaeh, unfortunately the patch won't apply cleanly to 7.x-3.0-beta4:
I'm attaching the phpmailer.class.inc.rej file. Many thanks for your support, please let me know if I can help further.

Sorry, my bad! It's too early in the morning :) I was trying to apply your patch over my modified version :| After cleaning up my own changes, the patch worked perfectly. And after choosing "LOGIN" as authentication type in the new options select I can send emails without problem.

This has been committed to the dev branch. I will be committing #2947486: Clean up code and then creating 7.x-3.0-rc1.