Tag Archives: yahoo

Yahoo SMTP Deferrals Take 2

Well, our good friends at Yahoo are at it again.

Once again they are deferring mail for no apparent reason.

Nothing has changed on my system and yet they haven’t accepted a message to deliver to one of their users in 3 days (maybe more). And, of course, there’s no way to actually contact a human to find out what is going wrong.

I’m on Yahoo’s email feedback loop … so I’m notified when someone complains about a message. Nothing has come in recently from the feedback loop.

I used to be on their bulk sender white-list. There was never a mention of having to renew the white-list approval.

A note to all my friends … DO NOT USE YAHOO FOR EMAIL! Especially for business email. The folks at Yahoo do NOT know how to provide service.

Gmail doesn’t have this problem … nor does Hotmail (much as I love to hate Microsoft).

Oh, and FWIW, yahoo customer service tends to ignore questions that are too complex for their script reading drones to answer.

DKIM Rule – SpamAssassin

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I put together a new SpamAssassin rule that will help identify spam from spoofed email addresses.

Some email providers always sign email with DKIM or DomainKeys … based on this assumption, if you get a message from one of those domains and it isn’t signed, you can assume its more likely to be spam.

This particular rule operates on the assumption that all mail from Yahoo & Gmail will be signed. It does not, however, raise the score a huge amount … because it’s just more LIKELY to be spam if it’s not signed … it’s not guaranteed to be spam. Some people may use the Yahoo or Gmail account’s in the from address, but not actually send from that service.
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Report as SPAM

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It’s nice that many of the major mail providers give you the ability to report a message you’ve received as spam … but some of them make it far TOO easy to report something as spam.

I’ve noticed that many of the big names put the “Report as spam” button way too close to the delete button.

Let’s take a look at some of the providers …

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Yahoo SMTP Deferrals

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As I mentioned before … even though I’m participating in Yahoo’s Email Complaint Feedback Loop, I’m still getting deferrals when trying to deliver mail to Yahoo’s mail servers. I’ve gotten a few complaints, but not nearly enough to really justify having mail delivery deferred.

I think I’ve figured out a bit more about why Yahoo’s mail servers are deferring some of the mail my servers try to deliver to them.

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