Deliverability.com has a blog post from Naeem Kayani at Adknowledge about the recent Yahoo changes. They point to the reputation of the From: address as a factor. I’m not sure anyone knows what exactly Yahoo is doing, but the suggestions from Naeem are good ones.
I’ve mentioned here before that I can usually tell when the big ISPs are making changes to their spam filtering as that ISP dominates my discussions with current and potential clients and many discussions on delivery mailing lists.
The last two weeks the culprit has been Yahoo. They seem to be making a lot of changes to their filtering schemes right at the busiest email marketing time of the year. Senders are increasing their volume trying to extract that last little bit of cash out of holiday shoppers, but they’re seeing unpredictable delivery results. What worked to get mail into the inbox a month ago isn’t working, or isn’t working as well, now.
Some of this could be holiday volume related. Many marketers have drastically increased their mail volume over the last few weeks. But I don’t think the whole issue is simply that there is more email marketing flowing into our mailboxes.
As I’ve been talking with folks, I have started to see a pattern and have some ideas of what may be happening. It seems a lot of the issue revolves around bulk foldering. Getting mail accepted by the MXs seems to be no different than it has been. The change seems to be based on the reputation of the URLs and domains in the email.
Have a domain with a poor reputation? Bulk. Have a URL seen in mail people aren’t interested in? Bulk. Have a URL pointing to a website with problematic content? Bulk.
In the past IPs that were whitelisted or had very good reputations could improve delivery of email with neutral or even borderline poor reputations. It seems that is no longer an effect senders can rely on. It may even be that Yahoo, and other ISPs, are going to start splitting IP reputation from content reputation. IP reputation is critical for getting mail in the door, and without a good IP reputation you’ll see slow delivery. But once the mail has been accepted, there’s a whole other level of filtering, most of it on the content and generally unaffected by the IP reputation.
I don’t think the changes are going to go away any time soon. I think they may be refined, but I do think that reputation on email content (particularly domains and URLs and target IP addresses) is going to play a bigger and bigger role in email delivery.
What, specifically, is going to happen at Yahoo? Only they can tell you and I’m not sure I have enough of a feel for the pattern to speculate about the future. I do think that it’s going to take a few weeks for things to settle down and be consistent enough that we can start to poke the black box and map how it works.
In early February Yahoo announced they were no longer offering preferred delivery to Goodmail customers. By the end of March, Yahoo will have decommissioned the Goodmail specific mail handling servers. What does this mean for Goodmail customers who have no history of mail to the normal Yahoo mail exchanges? Will they have to go through an IP warmup period?
Thankfully, no, they won’t. IP addresses that have been delivering Goodmail certified mail are being transitioned across to the Yahoo whitelisting program. Just because customers are losing Goodmail certification does not mean they will lose all their sending history at Yahoo. This is very good news, as senders don’t have to give up all their sending history due to Yahoo’s decisions.
I have heard some grumbling from some delivery experts that the ‘pre-warmup’ isn’t meaningful or useful. I strongly disagree. The reason senders have to warm up IP addresses is because spammers are very good at finding unused addresses and exploiting them to send spam. The warmup period gives the receivers a way to evaluate the mailstream from a particular IP and determine if the mail is wanted without having to subject their users to excessive amounts of spam.
In this case, Yahoo knows that good senders will be moving from one set of mail exchangers to another. They have nothing to gain by forcing those senders to go through a warmup period. They know what the mailstreams look like and can special case them. This isn’t a benefit every sender gets, in fact losing established reputation is one of the major considerations when moving IP addresses, ESPs or certification services.
While current Goodmail customers are getting this benefit now, they will be subject to the same spam filtering other senders face at Yahoo. Failure to meet Yahoo’s thresholds for good email may result in loss of whitelisting, bulk foldering of email and rate limiting.
More detailed information about delivering to Yahoo is available on the Word to the Wise Delivery Wiki.
Ken announced yesterday that Holomaxx dropped their suits against Ironport and ReturnPath. Suits against Yahoo and Hotmail are still active.
In the Yahoo case, there is a case management meeting on January 14th.
In the Microsoft case, a response the complaint is due by December 17th.
I’m not quite sure what happened to prompt this change, but I think it makes it even more unlikely that the case will be successful. The courts have repeatedly ruled in favor of ISPs in these kinds of cases.
EDIT: I’d link to Ken’s article, but I appear to have closed that tab and I can’t find it on his website. I’ll add it as soon as I do.
EDIT: Ken’s announcement