Yahoo delivery problems


Over the last week or so a number of people have mentioned problems with delivery to Yahoo. It seems that some emails are being erroneously rejected. Earlier this week, Yahoo posted a message to the Yahoo Postmaster announcement list saying they were aware of the problem and were working on fixing it.

some senders are seeing intermittent IP blocks when sending to Yahoo! Mail, with the SMTP error message from us citing that the block was due to a Spamhaus listing — e.g., “553 5.7.1 [BL21] Connections not accepted from IP addresses on Spamhaus PBL.” (See our full list of SMTP error messages at .)
If your IPs are currently not listed on any Spamhaus blocklist but you are seeing this error, please be assured that we are looking into the matter. We shall post an update once we have resolved the issue.

What I am hearing is that this is not a consistent error. Reattempting mail rejected with this message may be acceptable practice until Yahoo fixes the problem.

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  • Laura,
    Even though we are still seeing the Yahoo issue in our bounce logs after 7 days we have implemented a script to retry based on that error and with some success. However what we have noticed is the individuals being affected by the erroneous policy bounce are now being sent to the junk folder when before (some clients for over 2 years) were white listed and being sent to the inbox. Who knows what’s going on over at Yahoo!???

  • We are seeing similar issues. Some senders who were whitelisted for years are thrown off the whitelist after we notice these bounces.

  • Hi,
    Is there any update on this issue? We are being affected too. Starting last Wednesday, 80% of our email are landing in the spam folder, whereas prior to that, more than 95% are inbox. The strange thing is, our email are not being blocked. The bounce rate is pretty reasonable.
    I wonder if others can share their story, and share what they have heard from Yahoo.

  • I wonder if this is a permanent change on the part of Yahoo, or is this a temporary glitch. Anyone heard anything from Yahoo?

  • Steven:
    My understanding is this is a glitch and they’re attempting to fix it. Some of the Y! folks might be at MAAWG and I will see if I can get an update or some info to share.

  • Hi everyone. It looks like Yahoo did the fix on 6/4, Thursday. However the bulk rate remains very high. Are you guys seeing improvements in your inbox? We used to be > 95% inbox prior to last week.

By laura

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