Question about Outlook Express

I have a custom domain hosted by Yahoo on their servers (pop.bizmail.yahoo.com and smtp.bizmail.yahoo.com). I set up Outlook (not Windows Live) to retrieve and send e-mails through that custom domain. This worked fine for many months, then suddenly.... Just stopped (works intermittently, but less and less).

The way I set it up is as follows:

1. My primary alias on Outlook was an e-mail address on my custom domain

2. A send/receive account was set up for that same custom e-mail address, using the pop/smtp server settings provided by Yahoo

As I said, this worked fine for many months, and then just stopped, with an error message saying "we were unable to sign in to your pop server, please make sure your username and password are correct" (which they were).

I have tried setting up a different primary alias (i.e. -- a *** Email address is removed for privacy *** address) and then removing and re-adding the custom address as a new send/receive account - but I still get the same error, and now Outlook won't add the new account.

I am now able to SEND mails through Outlook using my custom domain (i.e., using my custom address as an alias), but completely unable to retrieve mails. Repeated attempts to set up the custom account again as a send/receive account are unsuccessful - Outlook simply appears unable to see and talk to Yahoo's servers, I keep getting the same error message (as above).

Please note:

1. The pop/smtp settings, ports etc. are correct - exactly as provided by Yahoo, and the same as what was working for months before the current problem arose.

2. My username and password have been correctly entered (repeatedly!).

3. I travel a lot, and am often in different time zones around the world - I never change the local time on my computer. I am wondering whether the problem may be due to:

a. Time differences or mismatches creating sync problems

b. Connections through servers in different countries creating the problem

Can anyone help? I just want Outlook to talk to Yahoo and get me my mails!!!!

Thanks!! :-)

Repeatedly over the last few months I have issues with using POP with Yahoo. Normally this lasted a day or so, but usually cleared up. I have two accounts from which Outlook.com was pulling the mail but both stopped about two weeks ago with "We had an error retrieving your mail from..." I tried deleting and recreating one of the two but now I can't add it at all. It works if I add it as a sending only account so it can authenticate with the SMTP server only the POP server is giving errors. Yahoo claim there is nothing wrong at their end and I can POP it on the desktop, just not on Outlook.com. It's as if there is something in the POP logon which is giving an unexpected result.

Over TELNET the response is (user and password hidden)

+OK hello from popgate-0.8.0.450444 pop101.plus.mail.bf1.yahoo.com
USER XXXXX
+OK password required.
PASS PPPPP
+OK maildrop ready, 0 messages (0 octets) (0)

Which looks ok to me (although it doesn't show the username in the maildrop line)

Any ideas?