Outlook Express 6 send mail SMTP error

[mattshirk]

One of the PCs on our network has inconsistantly been getting Outlook Express(v.6.0) errors when sending mail. The error reads: "Your SMTP server has not responded in 60 seconds. Would you like to wait another 60 seconds for the server to respond?"

None of the other PCs on the network (also using Outlook Express 6.0) ever get this error. They are all sharing the same DSL connection, too.

The message is always allowed to be sent later that same day. Hitting the "wait" button doesn't seem to help.

Any ideas why OE thinks (or is) getting disconnected from the SMTP server?

Thanks,
Matt

 

[smah]

What antivirus software is being used? If you disable the e-mail scanning component, does it work properly?

 

[mattshirk]

I found that recommendation (to turn off the virus scan) somewhere else and did turn it off last night. Too early to know if that worked yet since the error only appears once every couple of days.

I really don't understand why an antivirus would cause an error connecting to the SMTP server only occasionally. Can someone explain to me how that would only happen some of the time?

Thanks
Matt

 

[mattshirk]

It is using McAfee.

I tried that(stopping outbound email scanning) and it seems to have worked on 1 PC but since then other PCs on the network started getting the same message that do not have their own virus scans. (They are behind a router and firewall).

Our programer suspects an issue with our ISP.

 

[jimbuddy]

symantec antivirus ver.9 will cause this type problem. i've had this happen to me at leat twice in the last 6 months.

uninstall antivirus and re-install

problem fixed.

 

[mattshirk]

Ok Thanks for the help.

 

[mirvin]

I am having a very similar issue but with IMAP as opposed to SMTP. It occurs when I send a message and then OE tries to copy the message to the IMAP server. It is a DSL connection and I am currently look at the MTU settings on the PC's and the DSL router.

My understanding and unsure if this is correct or not, is that XP defaults to MTU of 1500 and it seems like the router is different.

I set the MTU on a pc to 1300 and the problem seems to have gone away.