AOL goes kablooey

Sometime last night, AOL managed to delete their MX records, causing mail to hard bounce for at least 3 hours, possibly more. Annalivia noticed, contacted the NOC, appropriate people were paged and the records are now functional again.
This morning AOL seems to be having more mail problems, possibly related to everyone retrying mail that was hard bounced last night after the MX record was deleted. Or the company is just finally showing the consequences of laying off so many people last year.
I think the most worrying bit about this is that the AOL NOC didn’t notice there was no mail coming in for 3 hours. I don’t get mail for an hour and I start checking to see if the mailserver has fallen over. I can’t believe no one noticed no incoming mail for 3 hours.
I suggest that anyone who had AOL bounces last night package those up and resend today. But don’t send them all at once, trickle them out over the course of the day. Remember, everyone else is trying to send their mail, too. And AOL is not having a happy day.
UPDATE: The Return Path Received blog points out some of the reasons some of you might still be seeing AOL mail fail. The fix is to flush your DNS cache or reboot your DNS server.

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AOL transmitting 4xx error for user unknown

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This is something broken at AOL’s end, and the guys with the magic fingers that keep the system running are working to fix it. Right now there doesn’t seem to be an ETA on a fix, though.
Even if you are a sender who is able to stop the retries, you may see some congestion and delays when sending to AOL for the time being. Senders who don’t get the message, or who are unable to stop their MTAs from retrying 4xx mail will continue to attempt delivery of these messages until their servers time out. This may cause congestion for everyone and a noticeable  slowdown on the AOL MTAs.
AOL blog post on the issue
HT: Annalivia

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AOL EWL: low complaints no longer enough

This morning AOL announced some changes to their Enhanced White List. Given I’ve not talked very much about the AOL EWL in the past, this is as good a time as any to talk about it.
The AOL Enhanced Whitelist is for those senders that have very good practices. Senders on the EWL not only get their mail delivered to the inbox, but also have links and images enabled by default. Placement on the EWL is done solely on the basis of mail performance and only the best senders get on the list.
The new announcement this morning says that AOL will take more into account than just complaints. Previously, senders with the lowest complaint rates qualified for the EWL. Now, senders must also have a good reputation in addition to the low complaint rates. Good reputation is a measure of user engagement with a particular sender.
This change only reinforces what I and many other delivery experts have been saying: The secret to good delivery is to send mail recipients want. ISPs are making delivery decisions based on those measurements. Send mail that recipients want, and there are few delivery problems.
For a long time good delivery was tied closely to complaint rates, so senders focused on complaints. Spammers focused on complaints too, thus managing to actually get some of their spam delivered. ISPs noticed and started looking at other ways to distinguish wanted mail from spam. One of the better ways to separate spam from wanted mail is to look at user engagement. And the ISPs are measuring engagement and using that measurement as part of their decision making process. Send so much mail users don’t read it, and your reputation goes down followed by your delivery rates.

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