Forwarding
Yahoo disabled forwarding
Al posted about this over on his blog earlier this week. Yahoo has disabled the ability to forward email from one Yahoo account to an email account on a different system.
There is, of course, all sorts of speculation as to why forwarding has been disabled including speculation this has to do with holding on to accounts during the Verizon purchase. It’s certainly possible this is the case.
However, forwarding email is hard. Forwarding email on a large scale can result in spam blocks and delivery problems. It’s such an issue M3AAWG published a forwarding best practices document. It’s possible that Yahoo is making some changes on the back end to better implement the best practice recommendations. I don’t know, but it’s possible that Yahoo is telling the truth that they’re improving technology.
Spamcop mail changes
Spamcop is shutting down it’s email service. While anyone could report spam using Spamcop, the system also provided users email addresses behind the Spamcop filters. This shut down should have no major impact on senders. Email addresses in use will still be accepting email, but that mail will simply be forwarded to another address, instead of users being able to access it through POP or IMAP.
The one problem some senders may have is IF they are solely authenticating through SPF and they are publishing a p=reject DMARC statement. This may result in some of the mail being rejected at the forwarding mail server, like AOL, Yahoo and other services respecting DMARC policy statements.
User forwarded mail will be coming from 68.232.142.20 (esa1.spamcop.iphmx.com) and 68.232.142.151 (esa2.spamcop.iphmx.com). If you don’t want to apply DMARC policy to known forwarded mail, those are the IPs to special case.