I have several users that are having issues receiving emails with attachments from some senders. For instance, one of my users said that someone tried to email him a PDF attachment & received the following undeliverable message:
mail.mydomain.com #554 5.7.1 Message cannot be accepted, content filter rejection "Receiving server does not accept this attachment type" ##
Then, we received a call from another client that said they were getting undeliverable messages when trying to send him .doc files. (they didn't provide the error)
The funny thing is I tried emailing him from my gmail account & he was able to receive both PDFs & DOC files from me.
Additionally, I had another user with a similar problem. Someone tried to send her a PDF...no luck. But if they sent it to someone else in our domain...no problem.
We're using Outlook 2003, Exchange 2003, SonicWALL NSA 2400 & IceWarp (for spam filtering).
Thanks in advanced for the feedback!