For reasons unknown to me or my hosting company, Yahoo! has decided to reject most emails I am sending this week. I’m not sure when it started – I believe it was sometime on Monday though, as those are the earliest emails I’m aware of not going through. I thought it was a once-off spam filter issue, but it turns out it is much more than that.
Whenever I write to a Yahoo address, I receive the following message a day or two later:
Delay reason: SMTP error from remote mail server after initial connection:
host a.mx.mail.yahoo.com [126.96.36.199]: 421 4.7.1 [TS03] All messages from 188.8.131.52 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
No action is required on your part. Delivery attempts will continue for some time, and this warning may be repeated at intervals if the message remains undelivered. Eventually the mail delivery software will give up, and when that happens, the message will be returned to you.
I have checked with my hosting company to see what they can do, but they are stuck too – there is no fix on our end.
Yahoo stinks for mail over the past year, blocking and deferring for no particular reason. Other people are having exactly the same issues, with no response from Yahoo. A lot of times, things like this are because Yahoo sees large numbers of script-generated mail, like from forms or forums, or blog subscriptions to posts coming through, and they just magically decide the sending server is spamming a user or multiple users on their systems. … we’ve been recommending that people switch over to Gmail for some time.
If you have a Gmail address where I can write you back, please let me know! I’m sorry about the inconvenience! I wish Yahoo! didn’t do this to us! If you’re waiting to hear from me – I have tried to write you back! I’ve got a long list of calls to make tomorrow as well just to check in and make sure people are hearing from me!