The software is not bug free and I see no real support from that company. Just try to remove yourself from it since it's not going to be fixed anyday soon.
In closing, the software is a possible security leak so it's not allowed at home or office. At the office, the email is stripped to plain text and attachments (which are then scanned with the antivirus program.)
So senders in incredimail do all that for nothing for the office...
Bob
Who out there knows a lot about Incredimail? I have problems.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic