I tightened the security screws on my Exchange server over the weekend and users are unable to get voicemails in their email. I turned of SSLv3, as well as some lower security ciphers. TLS1.0/1.1/1.2 are enabled. I am using port 587 to send mail to Exchange.
I've looked at the mail.mainlog , but it hasn't been changed since 11/8 and is empty.
I'm on version 6.0.11.119
EDIT:
Probably helps if I look at the correct log:
[11037 11-17-2015 9:04:51 ]*UM* IMAP INFO: Trying IP address [192.168.18.214]
[11038 11-17-2015 9:04:51 ]*UM* IMAP WARNING: SSL Connection failed, attemting TCP
[11039 11-17-2015 9:04:51 ]*UM* IMAP INFO: Trying IP address [192.168.18.214]
[11040 11-17-2015 9:04:51 ]*UM* IMAP ERROR: Connection failed to amos.sscorp.com,143: Connection refused
[11041 11-17-2015 9:04:51 ]*UM* IMAP ERROR: Connect failed; TCP Connection Failed
[11042 11-17-2015 9:04:51 ]*UM* 1556: FAILED to connect to IMAP Server
[11043 11-17-2015 9:04:51 ]*UM* IMAP ERROR: [CLOSED] IMAP connection broken (command)
[11044 11-17-2015 9:04:51 ]*UM* 1556: Restarting Main Thread
[11045 11-17-2015 9:04:51 ]*UM* 1556: Entering Main Account Thread Loop
[11046 11-17-2015 9:04:51 ]*UM* 1556: The previous connection attempt failed, waiting for 30 minutes.