Search The ForumSearch   RegisterRegister  LoginLogin

AfterLogic WebMail Pro
 AfterLogic Forum : AfterLogic WebMail Pro
Subject Topic: SMTP authentication failing after update Post ReplyPost New Topic
Author
Message << Prev Topic | Next Topic >>
molendinary
Newbie
Newbie
Avatar

Joined: 26 May 2026
Location: Georgia
Online Status: Offline
Posts: 1
Posted: 26 May 2026 at 2:29am | IP Logged Quote molendinary
Hi everyone,

I recently updated AfterLogic WebMail Pro to the latest version on my server, and since then I’m having trouble sending emails.

Incoming mail (IMAP) works fine, and I can log in without any issues. However, whenever I try to send an email, I get an SMTP authentication error saying “Unable to authenticate with outgoing mail server.”

Before the update, everything was working normally with the same SMTP settings. I haven’t changed the mail server configuration (host, port, username, or password), so I’m not sure what broke during the upgrade.

I’m using SMTP over SSL with port 465, and my mail server is hosted on a cPanel server.

Has anyone else experienced this after updating WebMail Pro? Could it be related to changes in how credentials are handled or TLS settings in the new version?

Any help or suggestions would be appreciated.
Back to Top View molendinary's Profile Search for other posts by molendinary Visit molendinary's Homepage
 
Alex
AfterLogic Support
AfterLogic Support
Avatar

Joined: 19 November 2003
Online Status: Offline
Posts: 2221
Posted: 26 May 2026 at 2:55am | IP Logged Quote Alex
Hi,

Enable logging in Admin panel, try again and check the logs. They may provide more details on which step the issue occurs.

Regards,
Alex
Back to Top View Alex's Profile Search for other posts by Alex
 
Alex
AfterLogic Support
AfterLogic Support
Avatar

Joined: 19 November 2003
Online Status: Offline
Posts: 2221
Posted: 26 May 2026 at 2:57am | IP Logged Quote Alex
https://afterlogic.com/docs/webmail-pro/troubleshooting/debug-logging-as-main-troubleshooting-measure
Back to Top View Alex's Profile Search for other posts by Alex
 
Cedrisamb
Newbie
Newbie
Avatar

Joined: 16 June 2026
Location: Ireland
Online Status: Offline
Posts: 1
Posted: 16 June 2026 at 1:46am | IP Logged Quote Cedrisamb
I would also check whether port 587 with STARTTLS works, as some servers are becoming stricter about SSL on port 465. Comparing the SMTP logs before and after the update might help narrow down whether it is a TLS issue or a credential handling change.
Back to Top View Cedrisamb's Profile Search for other posts by Cedrisamb Visit Cedrisamb's Homepage
 
demep
Newbie
Newbie
Avatar

Joined: 20 July 2026
Location: United States
Online Status: Offline
Posts: 1
Posted: 20 July 2026 at 9:55pm | IP Logged Quote demep
Hi,

One thing I'd check is whether the update reset or changed any of the SMTP settings in the admin panel. I've seen upgrades preserve most settings but occasionally require them to be saved again, especially if there were changes to the mail server configuration format.

Since IMAP authentication still works, it might also be worth testing the same SMTP credentials with another mail client (like Thunderbird or Outlook). If they work there, it would point more toward a WebMail Pro configuration issue than the mail server itself.

Also, are there any SMTP-related errors in the AfterLogic logs or your cPanel mail logs? They often provide a more specific reason than the generic "Unable to authenticate" message, such as an SSL/TLS negotiation problem or the server rejecting the username format. That information would help narrow it down.
Back to Top View demep's Profile Search for other posts by demep Visit demep's Homepage
 

If you wish to post a reply to this topic you must first login
If you are not already registered you must first register

  Post ReplyPost New Topic
Printable version Printable version

Forum Jump

Powered by Web Wiz Forums version 7.9
Copyright ©2001-2004 Web Wiz Guide