Yahoo Connectivity Problems Return

Yahoo has issued a notice that the MTA connectivity problems have returned as of 6am this morning. Mailers should expect to see increased deferrals in the form off 420 and 421 errors. This problem arose last week and has subsided and returned before.

The latest notice from Yahoo! follows:

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At around 6am PST, we again started experiencing low connectivity on our MXes, and we have since been working incessantly to improve the situation. As before, the SMTP error message being generated by the issue will generally be the following:

"420 Resources unavailable temporarily. Please try later [hostname]"

However, some senders may see our other "421" SMTP error messages as well, as listed here:

http://postmaster.yahoo.com/errors/

Ensuring that email is delivered in a timely manner is of the utmost importance and priority for us, so we appreciate your patience while we work on the issue.

Best regards,

Carlo
Yahoo! Mail

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Mailers should continue to wait four hours between retires as a best practice. Additional information can be obtained on the Yahoo! Postmaster site.

Cheers!
-Len Shneyder
Director of Partner Relations
& Industry Communications

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