GUI Error Trace:
FAILURE :E-mail settings saved successfully. But error occurred while trying to check connection with mail server - Problem connecting to mailbox.
LOG TRACE:
[16:33:06:197]|[11-09-2018]|[SYSERR]|[INFO]|[120]: javax.mail.MessagingException: Remote host closed connection during handshake;
nested exception is: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake|
Please check do the basic ping and telnet tests as shown below. If the results are successful, but the issue persists and if you are using Exchange server you can try the below steps to fix it.
ping <incoming server name> -t
telnet <incoming server name> <port>
Open the Exchange Management Console
and Execute the following command
Get-ServerComponentState -identity Servername
You will notice that the IMAPProxy state is set as inactive
To resolve this issue you must perform the following
Open the Exchange Management Console
and Execute the following command
Set-ServerComponentState -Identity Servername -State Active -Requester HealthAPI -Component ImapProxy
Now, check if you are able to save the mail server settings and start the mail fetching process. If that did not help, restart the application and check the issue.
If the issue still persists, kindly seek assistance from your mail server team to perform the command as, it is a mail server issue and not an application issue..