[Evolution] I/O operation timing out

[Carpetnailz <carpetnailz researchintegration org>]

I'm running Evo 3.4.4 on Fedora 17. 

About half the time or so when I do Send/Receive, I get this error
message:

Error while Fetching Mail.
Could not connect to mail.researchintegration.org: I/O operation timed
out.

Sometimes one or two of the three accounts I'm connected to there
download before the error occurs, sometimes none. About half the time it
works OK.

The host of my domain says they've checked and their system is ok. Also,
my wife, using Mac Mail, doesn't have these problems. And the problems
occur for me at work as well as at home. My other internet connections
do not seem problematic.

I tried switching from tls to no encryption, but that did not help.

Thanks.