… wherein I rename this blog “What change did Yahoo make today.” No, really, I like the guys at Yahoo a lot, but really, occasionally I would like to blog about something different! Today’s change, actually yesterday’s, is that Yahoo has closed their beta FBL program to changes or additions. It is a beta program, this is not unexpected. They will be making changes...
Yahoo posted some suggestions about contacting their postmaster group over on the ymail blog. They also explained what they were doing to solve the problems with response delays. Some of the problem is being caused by excessive follow-up emails, either because senders did not provide all the necessary information initially or because they are asking why they have not heard anything. Each of...
Yahoo is aware of the recent problems and have been working feverishly to fix them. A Yahoo employee posted to a mailing list earlier today, explaining some of the recent issues. The summary is: 1) The Yahoo delays are a result of a tighter spam filtering policy. The delays are the result of the system erroneously recognizing email as spam and deferring delivery. They do believe that retrying...
A number of people have posted to various mailing lists and made blog posts pointing to the Yahoo Mail blog post discussing recent problems Yahoo was having with mail. The general feeling seemed to be “AHA! That’s what is wrong!” Unlike many of my peers, I do not think this explains the delivery problems senders have been seeing while attempting to deliver mail to Yahoo. The...
You may have noticed increase in delays and rejections from Yahoo. I am certainly seeing a lot of customers complaining and hearing a lot of other delivery people commenting on problems getting mail into Yahoo. I have even heard from multiple ISPs that are struggling with full queues and delayed email. No solutions or suggestions right now, just that everyone is having problems right now. I...
It has been a rather busy day today, I do not have a full blog post. I did see a couple posts come across my RSS feeds. Both of them have content I want to talk about and discuss in a little more detail, as I think they touched on some very interesting issues. Network World has an article interviewing Mark Risher from Yahoo. The article discusses Yahoo’s use of DomainKeys as part of their...
Last week I requested details about Yahoo rejections for IPs pointing to the PBL when the IP was not on the PBL. A blog reader did provide me with extremely useful logs documenting the problem. Thank you! Based on my examination of the logs, this appears to be a problem only on some of the Yahoo! MXs. In fact, in the logs I was sent, the email was rejected from 2 machines and then eventually...
A few days ago I posted about Yahoo using the Spamhaus lists. In the comments of that post there have been multiple reports of mail being bounced from Yahoo with a reason of “on the PBL” but the IP was not on the PBL. I am happy to look into this for people. I’m sure neither Spamhaus nor Yahoo want to be incorrectly rejecting email. To do this, though, I need the rejection...
Yahoo has updated and modified their postmaster pages. They have also put a lot of work into clarifying their response codes. The changes should help senders identify and troubleshoot problems without relying on individual help from Yahoo. There is one major change that deserves its own discussion. Yahoo is now using the SBL, XBL and PBL to block connections from listed IP addresses. These are...
Over the last couple days multiple people have asserted to me that Yahoo is greylisting mail. The fact that Yahoo itself asserts it is not using greylisting as a technique to control mail seems to have no effect on the number of people who believe that Yahoo is greylisting. Deeply held beliefs by many senders aside, Yahoo is not greylisting. Yahoo is using temporary failures (4xx) as a way to...
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