A number of people have mentioned over the last couple weeks that they’re seeing a spike in Yahoo rejecting mail with
554 delivery error: dd Requested mail action aborted
Discussions on various mailing lists indicate these messages are related to inactive accounts. Addresses that bounce at Yahoo with these codes should be handled as inactive addresses and removed from future mailings.
A number of people, on different forums, have been asking if anyone is seeing a higher bounce rate than usual with Yahoo. Not sure exactly what’s going on here. As I understand it, folks are talking with Yahoo about it. If I hear anything more, I’ll share.
For now, though, if you’re seeing a small increase in Yahoo bounces (or other weirdnesses) others are seeing something odd, too.
We’ve returned from London, where I spoke at the Email Innovations Summit and enjoyed a bit of vacation. My wrap-up post also mentions an article I wrote for the Only Influencers site, which looks at questions I get asked frequently: “Why does spam make it to the inbox and our legitimate marketing email doesn’t? Should we just copy their tactics?”
In industry news, Yahoo caught our attention for two surprising moves: disabling forwarding and — much more disturbing — creating software for intelligence agencies to search customer email.
Some legal updates this month: The Second Court of Appeals upheld an earlier ruling that companies are in fact liable for the activities of their affiliates, including spam and fraudulent claims. This is important, as we often see spammers and cybercriminals use affiliates to distance themselves from these activities. We also saw another fine assessed for a violation of CASL, and noted with appreciation the transparency and thoughtful process that the Canadian Radio-television and Telecommunications Commission (CRTC) demonstrates in explaining their actions.
Another excellent report is the one created by the Exploratorium to explain their recent experience with being phished. It’s a good piece to share with your organization, in that it reminds us that these cybercriminals are exploiting not just our technology but our trust-based connections to our friends and colleagues. It’s important to raise awareness about social engineering as a part of information security. And speaking of email security, we were delighted to note that André Leduc received the 2016 J.D. Falk award this month at M3AAWG for his excellent work on this topic. It’s a fitting legacy to our friend, J.D., who died five years ago this month. We miss him.
Finally, we’d be remiss in observing Halloween without a post about zombies. Feel free to read it aloud in your spookiest voice.
I’ve been seeing reports over the last few days about an increase in bounces at Yahoo. Reliable people are telling me they’re seeing some increase in “invalid user” bounces.
You may remember Yahoo announced an overhaul of their mail product back in December. Reliable sources tell me that this is more than just interface revamp. In the back end, Yahoo! is removing older products with few users and security problems. This fits in with the changes CEO Mayer has been making with the company: slim down and stop supporting unprofitable products.
It makes sense that while engineers are looking at the guts of the email program and cleaning up the cruft, they will also disable long unused email addresses. This will result in higher unknown users for some senders.
What’s interesting to me is that the reports are somewhat sporadic. Some senders are seeing a huge percentage of bounces, some are seeing the normal percentage. I expect this difference isn’t anything more than how actively a sender purges based on engagement. Senders that purge unengaged addresses are going to have already removed a lot of the addresses Yahoo! is now purging from their database. Senders that keep sending to their whole list, are going to see a lot of unknown user bounces.
I’ve asked a few folks and people who’ve responded told me that spot checks showed all the addresses turning up as invalid had no engagement for long periods of time.
If you are seeing a lot of bounces at Yahoo! over the last few days, you need to remove those addresses from your lists. I also recommend looking at the engagement statistics of these newly purged recipients. This will tell you, approximately, what an abandoned address profile looks like. You can use that information to make good decisions about purging unengaged users at other ISPs as well. Not only does this lower costs, because you’ll be sending to less non-responsive email addresses, it will also improve delivery at many ISPs.