I am having some issues sending Emails with large attachments out of outlook 2003.
The Emails when sent will sit in the outbox and return the error during send and recieve
Sending reported error (0x8004210b) : the operation timed out waiting for a response from the sending (SMTP) server.
Sending reported error (0x800CCC0B) 0x800CCC0B
although it is sitting in the outbox and returning this error the message is continually sending to the recipient.
When disabling Trend Micro internet security the problem was rectified. I then just disabled the outgoing E-mail scanning function but that didn't help.
I cant find any proper support or fix for this so any help would be great.