March 19, 2018

Yahoo bounces mail in error!


Last week, a small group of ESPs discussed a sudden spike in hard bounces originating from Yahoo.com email addresses starting on March 14. Some mentioned seeing an increase as high as 5 times the daily average bounce rate.

This is the error code associated with the spike:

This type of behavior was seen in the past when the mail team at Yahoo (or another domain) purged old or inactive email accounts, so this instance wasn’t immediately seen as an issue… Until individuals at these ESPs started to validate the inactivity of some of these bounced emails. It was found in some cases, the users were active right up until the day before they bounced again, which puts the account clean-up hypothesis right out of play.

Several ESPs escalated the issue to the Postmaster support teams to investigate and comment on, which lead to an investigation into the problem. Yahoo’s team identified and corrected the impacted systems on their network returning a faulty bounce on March 16.

Here at 250ok, we reviewed several client accounts and confirmed this same activity was happening during this time frame. Based on this information, we recommend any Yahoo user identified as a hard bounce during March 14 and March 16 be tried again during the next scheduled mailing.

Author: Matthew Vernhout

Matthew Vernhout is a digital messaging industry veteran and Certified International Privacy Professional (CIPP) with more than a decade of experience in email marketing. Matt is 250ok’s Director of Privacy, and he is currently the Vice Chair of the eec, after serving for several years as the Chair of their Advocacy Subcommittee.

You may also like...

The Year in Email 2019

It’s hard to believe we are nearing the end of yet another exciting year in email, and 2019 proved to be one of the most momentous and active years to date. Over the past year, the number of new technologies, mergers and acquisitions, mailbox provider (MBP) announcements, news, and highlights is evidence of the versatility […]

[Infographic] Global Privacy Relationship Status: It’s Complicated

I recently gave a presentation on global privacy regulations to a post-graduate marketing class and one of the things I noticed while preparing was that even within a single country, privacy is complicated. On a global scale, it is really complicated. For example, Canada has one federal private sector privacy law, three similar provincial laws, […]

The Year in Email 2018

*Update: This article was featured on email influencer Jordie van Rijn’s emailmonday blog! To see it in action, plus a great round-up of other articles and thought leadership looking forward to the future of email, click here.* The Black Friday emails are deleted, marketers’ email lists are checked twice, we pretty much know which senders […]

Ready to get started?