can't send mail after internet upgrade

Hello,I got cable internet installed this week and am soon leaving my perfectly servicable,but slow dialup behind.I have Windows XP Home and use Netscape 7.1 usually. I still use my old ISP account and old email address to receive mail but I can't send or foreward any messages without the following message appearing after 10-20 seconds of waiting: "An error occurred while sending mail.The mail server responded 5.7.1 <email address of recipient> Relaying denied. Proper authentication required.Please check the message recipients and try again "
I can send a message to myself but noone else from my old ISP/ address. Also I can send a message from the new ISP address.
I checked the original internet account configuration and even ran System Restore using the restore date the day before cable was installed,but to no availThe computer is only 1 year old and runs well.
I can still send mail from my old computer using dialup as before.
Should I abandon my old email address entirely as I will have to do this when the account expires in September. Please advise.

 

Is your cable ISP the same one as your old dial-up ISP? If not, then the "relaying denied" message is the key to the problem.

ISPs usually refuse computers not connected to their network that try to use their mail servers. This is so spammers cannot 'relay' mail through the ISP.

You said your email sends when you are connected through dial-up but not cable. If the email account belongs to the dial-up ISP that's why. You are connected to the dial-up ISPs network when dialing in but are going through someone else's when using cable.

To use your old email account over your cable connection try changing the outgoing mail server to the one your cable ISP uses.

Cheers,

ICE

 

Thank you sincerely for your help.I changed my outgoing mail server to the one the cable company uses and now I can send mail again.So your insight was correct. I much appreciate folks like you who share their knowledge on this fine website.

 

Glad you got it working!

ICE