I am having problem in sending emails in windows mail in vista. Up to yesterday, it was working fine. I have deleted and created the account again.
Email address,pwd, pop n smtp etc everything is correct but email are not going. There is genuine windows vista with Mecafee. No problem with incoming mails. The poblem shown is "One or more messages in your outbox do not hav a valid account specified. Would u like to use your default account to send these messages."
Thanks

Your inquiry has been here for moths without a any answers. It appeared on a "similar questions" listings under one of my inquiries, so I'll take a stab at it.

I gather some ISPs have their networks to block outgoing emails sent directly to other SMTP servers as a SPAM control measure. Under those restrictions I gather it's necessary to set the outgoing mail server on the other accounts to your ISP's SMTP server.

YMMV.

Let me know if you're still monitoring this question and if these techniques work for you.