Thomas R. Stephenson:I assume in both cases Vista is blocking WinPMail access to the internet. Check the firewall settings, you might even want to turn it off for a bit to see if this helps.
Thanks for that.... but it does not seem to be the case here. Please see some more info below:
a. I disabled the Vista firewall but it did not help.
b. It does sometimes (though not always) send-out the 'stuck' message after several retries, I would expect the firewall to behave more consistently if it was to blame?
c. It does send-out fine with no problem at all when using dial-up and nor broadband.
d. It is more likely to happen with larger messages, the send process will go up to around 95% and then hang. But sometimes very small messages with no attachment will not go through either.
e. I tried changing various MTU settings in the Registry using programs such as DrTCP (after looking it up on the Internet and reading some discussions on similar issues), but again no luck.
f. As said above, it is not related to the ISP or SMTP server in use, I have this problem with three different providers.
g. I am using McAfee VirusScan Enterprise 8.5i Patch 5, it can not be disabled completely (other than by un-installing it) but it does log any blocked activities, and there is nothing in the McAfee log...
Thanks again.