Original Title: Windows Mail (Vista) INTERMITTENT SEND PROBLEM.
"SMTP, Server Response: '554 5.7.1 <*** Email address is removed for privacy ***>: Relay access denied', Port: 25, Secure(SSL): No, Server Error: 554, Error Number: 0x800CCC79"
NOTHING, Changed since it worked.
No system updates, no boots, no crashes, it just started failing.
One email sent properly and the next one failed. I've checked all properties under parameters and they are correct.
Now I can't send anything. HELP!