Can't send Emails with large attachments in outlook 2003, Trend Micro Issue?

Hi Guys,

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.

Cheers


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SM17CHAsked:
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SteveNetwork ManagerCommented:
we see this a lot.. its usually caused because your ISP's SMTP server has timed out due to the length of time it has taken to receive the email, and because it hasnt told your mail client that it has finished receiving, you send it again .. and again .. and again..

the other reason we've seen is that the actual outbox or sentitems folder (esp in outlook express) has a corruption in it ( because there is a 2gb limit on mailstore size).. run an exchange PST checking program over your mailstore to make sure its ok..

something like the microsoft PST repair tool..


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SM17CHAuthor Commented:
The same thing is happening with the same account on different PC's within the office (All have trend installed) so it would probably not be the PST Files, do you know what is involved in getting the time out length changed? or is it just a set amount of time that the ISP allows?
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