Greetings from Dublin, where we’re gearing up for M3AAWG adventures. In the blog this month, we did a post on purchased lists that got a lot of attention. If you’ve been reading the blog for any length of time, you know how I feel about purchased lists — they perform poorly and cause delivery problems, and we always advise clients to steer clear. With your help, we’ve now compiled a list of...
Yahoo has updated their FAQ and listed out a number of factors they use to determine if a mail message is spam. IP Address Reputation URL Reputation Domain Reputation Sender Reputation DomainKeys Identified Mail (DKIM) signatures DMARC authentication Autonomous System Number (ASN) reputation Autonomous System Number (ASN) is a globally unique number that is assigned to a group of IP networks...
We’re seeing multiple reports that the Yahoo feedback loop stopped working some time in the past couple of days. If you’re not seeing reports, it’s not just you.
Via mailing lists and Al Iverson’s Spamresource blog, Yahoo China domains (yahoo.com.cn and yahoo.cn) are no longer accepting email. Yahoo announced in April of 2013 they are shutting down their email services in August of the same year and advises users to create new accounts with Alibana. While the domains still have valid MX records, they are no longer accepting mail. There is no...
Welcome to a whole new year. It seems the changing of the year brings out people predicting what they think will happen in the coming year. It’s something I’ve indulged in a couple times over my years of blogging, but email is a generally stable technology and it’s kind of boring to predict a new interface or a minor tweak to filters. Of course, many bloggers will go way out on...
I’m seeing scattered reports today that a lot of places are seeing backed up queues to Yahoo. They’ve had some problems over the last few days and seem to be still recovering. It’s looking like it’s something internal to Yahoo. One set of error messages I’ve seen reported by numerous people is: “451 4.3.2 Internal error reading data.” It’s not you...
Update: As of mid-morning pacific time on 10/7 yahoo.com has been removed from the FCC list. As part of CAN SPAM the FCC maintains a list of wireless domains that require proof of permission to send mail to. Recently, various email folks noticed that yahoo.com was added to this list. According to the law, senders have 30 days to meet the permission standards for any recipients at domains on the...
I’m building a new set of mailservers for wordtothewise.com – our existing mailserver was “I’ll repurpose this test box for a week” about four years ago, so it’s long past time. I tested our new smarthost by sending a test mail to gmail. This is the very first email this IP address has sent in at least three or four years, possibly forever: host gmail-smtp-in.l...
Each month, we like to focus on a core email feature or function and present an overview for people looking to learn more. This month, we addressed authentication with SPF. We also talked about feedback mechanisms, and the importance for senders to participate in FBL processes. In our ongoing discussions about spam filters, we took a look at the state of our own inboxes and lamented the challenge...
It’s probably only a surprise to people who think DMARC is the silver bullet to fixing email problems, but the spammers who were so abusing yahoo.com have moved on… to ymail.com. In the rush to deploy their DMARC policy, apparently Yahoo forgot they have hundreds of other domains. Domains that are currently not publishing a DMARC policy. Spammers are now using those domains as the...
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