> > But, your problem looks kinda like your host is in a blacklist hence > > is being blocked: > > > Reason: Remote SMTP server has rejected address > > > Diagnostic code: smtp;554 Service unavailable; Client host [206.46.173.5] > > > blocked using psbl.surriel.com; Listed in PSBL, see > > > http://psbl.surriel.com/listing?ip=206.46.173.5 > > Verizon.net has been blacklisted? That seems unlikely... Just for fun, I did look at the PSBL URL in your bounce header, the one excerpted above. The 'evidence' section shows that address 206.46.173.5 had indeed been blacklisted for sending spam five times (as of when I looked), and had been manually removed via webpage from the blacklist each time, shortly after having been blacklisted. If this is the IP address of your machine, you have most likely been infected as somebody's spambot. And if it is your address and you were not the one who un-spamblocked your address via web interface at psbl.surriel.com, then presumably either the bot or bot master did it. Any of these situations would concern me greatly if it involved my own machine, and would prompt me to vigorously attempt mitigation. If 206.46.173.5 is (or at the time was) not the IP address of your machine, I don't know why you would get bounce messages about that address. --- Brent