Ironport have rolled out an update to their rule engine which has a bug causing mail problems. According to discussion on the mailop list, the new rule engine is folding the header with a line feed (LF) rather than a carriage return (CRLF). This is breaking things, including DKIM signatures. Ironport is aware of the issue. I expect an updated rollout shortly.
AOL migrated the last few users onto the Yahoo infrastructure today. It’s really gone. Also, while looking up some info related to this post, I discovered Verizon Media has a postmaster blog hosted on Tumblr.
I’ve seen a number of reports in different areas talking about an increase in Yahoo user unknowns. The same thing happened almost a year ago. This may be when Yahoo does clean up or it could be a coincidence. Folks at Verizon Media are looking into it
Be careful purchasing lists of DigiMarCon NY 2019 Attendees. There’s at least one list being sold out there that is just a scraped list of addresses. I’ve gotten emails asking for meetings and offering services because I am on the exhibitor list. I’m actually not on the exhibitor list, nor have I ever been to that conference in any capacity.