SMTP Time Out (0x8004210B) in Outlook 2007

[Andrew Smith]

Hello,

I have been running Outlook 2007 on Vista Ultimate for several months with 4
POP3/SMTP Email accounts all functioning correctly. On Tuesday three of the
accounts ceased being able to send email using SMTP. The only connection
between these accounts (and the only difference to the single functioning
account) is that they require me to log on to the SMTP server using the same
credentials I use for receiving.

No matter how long I set the timeout on the connection I get the following
message: 0x8004210B 'The operation timed out waiting for a response from
the SMTP Server. If you continue to recieve this message, contact your
server administarator or ISP'

I can send using identical settings on my laptop running Outlook 2003 on XP
to send and receive on all 4 accounts. I have spoken to the 3 seperate
account providers and they have not suggested anything other than
re-installing Outlook - which I have done to no avail. I have removed the
account and recreated it. I have also created a new PST file which I have
copied all my saved mails into and tried using this, again with no luck.

Incidentally the send and recieve progress suggests there are 5 mails in the
outbox where I have only one in my outbox.

I have taken the following from the outgoing log file (changing the mail
servers name for security)

2007.07.26 10:45:45 SMTP (mail.m.com): Port: 25, Secure: no, SPA: no
2007.07.26 10:45:45 SMTP (mail.m.com): Finding host
2007.07.26 10:45:45 SMTP (mail.m.com): Connecting to host
2007.07.26 10:45:45 SMTP (mail.m.com): Connected to host
2007.07.26 10:46:01 SMTP (mail.m.com): Disconnecting from host
2007.07.26 10:46:01 SMTP (mail.m.com): Disconnected from host

Any suggestions very gratefully appreciated as this doing my head in.

Thanks in advance,

Andrew

 

[K. Orland]

Have there been any updates to your antivirus software, such as an engine
update or patch?

 

[Andrew Smith]

I can't find a record of anything happening in the logs but Norton Internet
Security was the culprit. Disabled it sent mails OK enabled it and could
still sned. Not sure why but there goes....

 

[K. Orland]

NIS is infamous for interfering with Outlook. Check their website for any
patches, etc. that may be required.