What mean this error - IMAP LOGIN attempt failed from IP...

[noamway]

Full message:
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Message: IMAP LOGIN attempt failed from IP address
Time: 04/05/2013 20:12:16
Severity: Critical
Postoffice: mydomain.com
Mailbox: info

What do we need to do when we get that?

[rfwilliams777]

Error with user attempting to log into their e-mail account using the IMAP connection. Contact the user and see if they need any assistance. If it is occassional or sporatic, it could be time-out issues with them and your server. That could be a number of possible issues.