I am having the same problem. I can receive pop3 email no problem, but when I try to reply to an e-mail I always get a bounce back email from "System Administrator" that has "invalid message recipient" as the Subject. The recipient's email address is not invalid. I can send an e-mail through my desktop computer's e-mail program to that address with no problems.
The weird thing is that I can send e-mails from my ppc when I am linked to my home computer but not from my work computer. All I can figure is that they have my work computer set up so that I have to use their outgoing mail server to send emails (and I don't know what it is) instead of using my home isp's outgoing mail server. Any ideas?
The recent suggestions that I've gotten have been to make sure "Outgoing email server requires authentication" box is checked under Accounts setup, page (2/3) under Options. But I've tried it and it still doesn't work for me. You might give it a try.
I have to agree with what 'Dpotter' said bout this. (see below)
I was getting the 'invalid message recipient' message when I tried to send e-mails from work, yet it sent them just fine from home.
That's because I was trying to send e-mails from work using my home isp's smtp server. Apparetly that doesn't work.
I had to ask the IT guy what my work's outgoing email server was. Once I changed the outgoing server to match the current isp (and turned on the authenication checkbox) I was able to send email from work.
So now I have two "services" set up for the same e-mail account. One of them has my home isp's outgoing email server and the other has my work's outgoing email server. If I am at home I use the home one, and I use the work one at work.
Thanks for the help Dpotter!
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What I found is that although my POP is set to the Road Runner Pop server, the SMTP needs to be set to the Bellsouth SMTP server (even though I dont have an email account with them.
Originally:
POP Server = pop-server.carolina.rr.com
SMTP Server = smtp-server.carolina.rr.com (this didn't work)
Changed to:
POP Server = pop-server.carolina.rr.com
SMTP Server=mail.bellsouth.net (This works!!!!)