I use Sky's SMTP server with my 1&1 domain name email. As you know, to do this, you have to register the alternate sending address via Yahoo and this has worked fine once done. Around a month ago though I found I could no longer send via Sky smtp with my mails being rejected. OK, just go back to 1&1's smtp server, but it is nice to have a backup.

Looking a bit further this morning I realised that Sky/Yahoo had dropped my third party email from my settings. Once restored (having worked out how to do it) it now works fine.

So for any others in this situation, it seems Yahoo quietly removed our third party settings... maybe tied in with all the other changes going on at Yahoo/Oath.

(very quiet on skyuser at the moment, this email section seems even quieter).