[Evolution] Delays in receiving IMAP e-mail

[John Lauterbach <lauterba bellsouth net>]

I am using evolution 3.16.0 running under Ubuntu 15.04.  One of my e-mail accounts is IMAP, the others are POP.  Evolution is set to poll each e-mail server every 5 minutes.  About a week ago, I noticed that I was not getting e-mails from the IMAP account.  When I used the providers webmail service, I found the missing e-mails in my webmail inbox.  Eventually, they got to my PC.  Sometimes the days have been well in excess of the polling time.  Right now webmail shows an e-mail that is been in the webmail inbox for almost 15 minutes.

Is this normal behavior for evolution?

Thank you,

John