Issue “Incorrect authentication data”

Hi Eleonora @elliemaffio93,

The warning you are seeing is not overly concerning as your domain everseensa.com does seem to be based on the cPanel hosting server at host.frisbee.host. The IPs certainly match.

Your authentication seems to be set to ‘Plain’ in your plugin settings. Can you try changing it to ‘Login’? Looking at your hosting, it seems to be cPanel based so assuming you are using that cPanel server for your SMTP – it will almost definitely not support Plain login.

Please let us know how you get on after that change and whether it succeeds or you hit another problem.

Kind Regards,
Tim

• This reply was modified 4 years, 3 months ago by Tim. Reason: Unfinished sentence!

Hi Tim,

First of all thank you for the quick answer.
I tried, as you suggested, to set my authentication method to “Login” instead of “Plain”, but I still keep on getting the error of “incorrect authentication data” in the log.
Also, I checked and you’re right: we are using cPanel server for the SMTP.

Here’s the diagnostic test i just run (hope it’s useful):

Mailer: postsmtp
HostName: everseensa.com
cURL Version: 7.73.0
OpenSSL Version: OpenSSL/1.1.1h
OS: Linux host.frisbee.host 3.10.0-1062.9.1.el7.x86_64 #1 SMP Fri Dec 6 15:49:49 UTC 2019 x86_64
PHP: Linux 7.1.33 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=No, mcrypt=Yes, zlib_encode=Yes
WordPress: 4.9.15 it_IT UTF-8
WordPress Theme: BonVoyage Child
WordPress Plugins: Polylang, Contact Form 7, Contact Form CFDB7, Elated Core, Elated Instagram Feed, Elated Membership, Elated Tours, Envato Market, Insert Headers and Footers, Cookie and Consent Solution for the GDPR & ePrivacy, WPBakery Page Builder, User Profile Picture, Post SMTP, Slider Revolution, W3 Total Cache, Yoast SEO, WP Cerber Security, Antispam & Malware Scan, WP Review Slider, Smush
WordPress wp_mail Owner: /home/everseensa/public_html/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress phpmailer_init Action(s): wpcf7_phpmailer_init, PostsmtpMailer->phpmailer_smtp_init
Postman: 2.0.15
Postman Sender Domain (Envelope|Message): everseensa.com | everseensa.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SMTP (smtps:login://mail.everseensa.com:465)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 0 | 12

Thank you very much for your help,

Eleonora

Hi Eleonora,

Okay, interesting! Can you run a connectivity test from the plugin settings please, and then post a screenshot of the results here? You might need to use something like Dropbox or Google Drive to ‘host’ the image temporarily.

I’m sure you have, but don’t forget to also check that your username and password are correct for the SMTP server. In the case of cPanel the SMTP username is always the full email address including the “@domain.tld”.

Look forward to hearing how that goes! ??

Kind Regards,
Tim

Hi Tim!

I just run a connectivity test.
Unfortunately, I’m having trouble with uploading the screenshot (…feeling super stupid).
I hope it’s ok to just write down what I see:

Inside the grid, all status are OPEN and green coloured.
For the first three sockets (mail.everseensa.com:25 – mail.everseensa.com:465 – mail.everseensa.com:587 ) everything looks green and ok.

I get three warnings in the second part of the test result:
1) port 25 can be used for SMTP to mail.everseensa.com. Warning: connected to frisbee.host instead of everseensa.com
2) port 587 can be used for SMTP to mail.everseensa.com. Warning: connected to frisbee.host instead of everseensa.com
3) port 465 can be used for SMTP to mail.everseensa.com. Warning: connected to frisbee.host instead of everseensa.com

Hope I included enough details for you to help me.
Sorry about the screenshot. Let me know if you need more info about the connectivity test!

Thank you very much,

Eleonora

Hi Eleonora,

No worries! Just for testing – can you try switching the SMTP server to host.frisbee.host (which is the cPanel server and see if it will authenticate?

Have you double checked the email and password of the SMTP account you are using? Webmail might be a good place to verify the details are correct.

Kind Regards,
Tim

Hi @elliemaffio93,

We haven’t heard from you in a while, so I’ll mark this thread as resolved. If you have any further questions please feel free to open a new thread, and link to this one.

Kind Regards,
Tim