Yahoo retiring user IDs: why you shouldn't worry

A couple weeks ago, Yahoo announced that they were retiring abandoned user IDs. This has been causing quite a bit of concern among email marketers because they’re not sure how this is going to affect email delivery. This is a valid concern, but more recent information suggests that Yahoo! isn’t actually retiring abandoned email addresses.
You have to remember, there are Yahoo! userIDs that are unconnected to email addresses. People have been able to register all sorts of Yahoo! accounts without activating an associated email account: Flickr accounts, Yahoo groups accounts, Yahoo sports accounts, Yahoo news accounts, etc,. Last week, a Yahoo spokesperson told the press that only 7% of the inactive accounts had associated email addresses.
Turning that around, 93% of the accounts currently being deactivated and returned to the user pool have never accepted an email. Those addresses will have hard bounced every time a sender tried to send mail to that address.
What about the other 7%? The other 7% will have been inactive for at least a year. That’s a year’s worth of mail that had the opportunity to hard bounce with a 550 “user unknown.”
If you’re still concerned about recycled Yahoo userIDs then take action.

  1. Go through your customer database and identify Yahoo IDs that bounced over the last 12 months with “user unknown.” Permanently disable those addresses in your database. This is particularly important if you have any reason to think you may need to email your whole database (like legal notices).
  2. Consider setting up internal processes that if those addresses show up on your list in the future, you actually send out confirmation messages and get the recipient to double opt-in.
  3. If you have accounts tied to those usernames, disable the accounts and do not let new users of those addresses see the old data. Remember, these are addresses that have been inactive for at least 12 months, and have been returned to the pool. The new user is probably not the same as the old user.

What Yahoo! is doing is not unusual. Many ISPs recycle unused and abandoned addresses back into the pool regularly. The difference here is that Yahoo announced it beforehand. For email marketers, there really is nothing new here and they shouldn’t worry.
Carlo at Exacttarget has more to say from a delivery standpoint. 

Timely and appropriate mail
Barracuda clicking all links in emails

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The Next Web says that Yahoo users are being compromised by an XSS exploit. I have noticed a lot more virus from Yahoo users over the last 2 days, including one person who said their account was broken into while she was on the ski slopes. It may not be exactly an XSS hack, but something is broken at Yahoo and the spammers seem to be somehow getting around Yahoo’s outbound filters.

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TWSD: Adapt to filters

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My favorite has to be the animated gif of how to click “not spam.”
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Increase in bounces at Y!

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.

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