Feature request: Additional Logging for xfce4-mailwatch-plugin

[Thangalin]

Hi,

I have Thunderbird configured to read my mail correctly. When I tried
to apply the same settings to the xfce4 mailwatch plugin, the
mailwatch log panel shows:

* 2019-09-10 07:00:23: [First Last (domain)] Connection timed out
* 2019-09-10 07:00:23: [First Last (domain)] Failed to connect to
server "mail.domain.ca": Operation now in progress

Without knowing why the server connection failed, I cannot fix the
problem. Thunderbird can connect no problem, but the same settings
don't seem to let mailwatch check the Inbox for new messages.

I'd like to request that a more detailed messages be added to the log
to help debug issues. For example:

* Failed to connect to "mail.domain.ca" on port 993 using SSL/TLS.
Reason: Host unreachable

Where "Reason" could include issues such as: "Invalid credentials",
"Server not listening on port", "Incorrect SSL protocol version", or
any other issues that have actionable resolution. As it stands,
"Operation now in progress" and "failed to connect to server" offer no
insight into how to resolve the issue.

Thank you!
T X