Nearly 2 weeks after Yahoo.com made their DMARC security change, AOL.com followed suit. On April 22nd, AOL.com, AIM.com and CS.com published a DMARC record to tell mailbox providers all over the world to refuse any mail claiming to be from AOL that isn’t sent directly from AOL’s servers. AOL’s blog describes the change in detail.
Last weekend, Yahoo.com made a security change to their domain that affects anyone sending email with the From Address of @yahoo.com that isn’t using Yahoo!’s servers to send the mail. Any email marketer that uses @yahoo.com as their From Address may have noticed their delivery rates plunge.