MessageLabs/MXLogic issues

Have any of you noticed issued delivering email through MessageLabs to
people who use MXLogic for spam/AV filtering? I've seen it more and more
over the last month, to the point that I have to call 5-10 people a day to
tell them to whitelist our domain in MXLogic. It isn't specific to a certain
domain, just to Symantec/MessageLabs IPs. I've also seen this issue once or
twice with domains hosted with Gmail, but those have cleared themselves up.

-- Thomas York

Better on the mailop list. I believe (but am not certain) that personnel
from those operations are present there.