Hi. Today one of my customers said that he could not connect to his IMAP mailbox after adding it to the Mail app on Mac OS High Sierra.
I double checked every setting on this application (via TeamViewer) including TLS/SSL and IMAP/SMTP ports, to no avail. Also tried connecting non securely. It simply says it cannot verify the username and password. And the weird thing is: the Outlook app on mobile can connect just fine.
But here's a thing that might shed a light on this: Outlook 2016 on Windows was able to connect effortlessly, but only after throwing an INVALID CERTIFICATE error. That certificate says it was issued to "serverhost.serverdomain.com" (my hostname and domain of course) while I'm connecting to "mail.customerdomain.com", so obviously there is a mismatch - even though Cpanel correctly issued and installed an SSL certificate to "mail.customerdomain.com".
So, how do I resolve this?
I double checked every setting on this application (via TeamViewer) including TLS/SSL and IMAP/SMTP ports, to no avail. Also tried connecting non securely. It simply says it cannot verify the username and password. And the weird thing is: the Outlook app on mobile can connect just fine.
But here's a thing that might shed a light on this: Outlook 2016 on Windows was able to connect effortlessly, but only after throwing an INVALID CERTIFICATE error. That certificate says it was issued to "serverhost.serverdomain.com" (my hostname and domain of course) while I'm connecting to "mail.customerdomain.com", so obviously there is a mismatch - even though Cpanel correctly issued and installed an SSL certificate to "mail.customerdomain.com".
So, how do I resolve this?