Domain isn't in my list of allowed rcpthosts

Two days ago I installed the 'Opera' browser, having had a serious slowdown with my Outlook Express. I'm very pleased with my decision. Today, however, I sent an email with 'Opera' to a Yahoo address and received the following notification for my efforts:

Recipient error [553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)]

I tried to resend the message several times, but received the same reply. I then opened Outlook Express and sent it successfully, without any problem. Would anyone have any idea what happened here when I tried to send the email with my Opera browser and failed, but had no problem with Outlook Express? Thank you.

 

See if this helps.

Opera Mail Tutorial

 

Thanks, Whiskeyman. My email address is with an ISP which I used formerly, while my internet connection is now with another. I had the mail account in Opera configured with the first server for both my incoming (POP) and outgoing (SMTP) mail, which apparently you cannot do. You have to have the outgoing mail (SMTP) configured for the company you now have the connection with. I changed my SMTP setting to the setting provided by my present internet provider and now all is well.