IMAP SSL error in iOS "stable connection to the server could not be established"

[fokakmeny]

Hello.
After updates to v110 both 110.0.1 and 110.0.2 some iOS users reported getting errors while using IMAP/SMTP services over SSL.
Error:
"stable connection to the server could not be established".
If they turned off using SSL, it works again as expected.
My VPS OS: Centos7.
The error was reported by 2 different users using different domain. Both has SSL certificates installed via AutoSSL using Let'sEncrypt.
They are using email client "MyMail" iOS App which as they reported to me was working alright until right before the update happened.
Best Regards

 

[cPRex]

Hey there! I'm not aware of anything in the recent updates that would change the email behavior.

Do you know if they are using the hostname for their email connection or their individual domain, or their own unique domain? If so, checking the SSL is working would be a good first step, if you haven't done that already.

Another alternative may be to try a more well-known client, like Thunderbird, just to see if that experiences the same issues. If not, the issue could be with the client itself.

 

[fokakmeny]

Hey there! I'm not aware of anything in the recent updates that would change the email behavior.

Do you know if they are using the hostname for their email connection or their individual domain, or their own unique domain? If so, checking the SSL is working would be a good first step, if you haven't done that already.

Another alternative may be to try a more well-known client, like Thunderbird, just to see if that experiences the same issues. If not, the issue could be with the client itself.

It turned out to be an internal App issue and nothing related to cPanel.
Thank you very much.

 

[cPRex]

I'm glad to hear you were able to get that working!