I had a request at work last week from a client asking me to look at why their Mac wouldn't receive email suddenly. They could send fine.
I could see no settings had changed. Did all the usual checks, rang Spark to see if any issues reported. Specifically told them it was Outlook 2011 for Mac. They said 'nothing we're aware of, it should be working fine'.
So Spark, if you're going to go and make a change like this, you should probably either let clients know first, or at least make sure your help desk staff actually know about it. I actually called both the standard support team and the Yahoo/SMX changeover team and got the same answer from both.
Anyway, I managed to get it working with a bit of trial and error - this was my workaround and I post it purely in the hope that someone from Spark won't read this and then block this method too (assuming they have the ability to do so - I suspect this would only be controlled by Yahoo). It worked for me - obviously no guarantees it'll work for everyone.
- This workaround was for a client using Outlook 2011 on a Mac, using POP3 (didn't test with IMAP as I didn't need to).
- Change the incoming POP3 mailserver from pop3.xtra.co.nz to pop.mail.yahoo.com
- Add @xtra.co.nz to the end of your username (if not already there).
All other settings (TLS/SSL/etc) should all stay the same.
Hope this helps those of you that were as surprised by this as my customer was.