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Increase in bounces at Y!

I’ve been seeing reports over the last few days about an increase in bounces at Yahoo. Reliable people are telling me they’re seeing some increase in “invalid user” bounces.
You may remember Yahoo announced an overhaul of their mail product back in December. Reliable sources tell me that this is more than just interface revamp. In the back end, Yahoo! is removing older products with few users and security problems. This fits in with the changes CEO Mayer has been making with the company: slim down and stop supporting unprofitable products.
It makes sense that while engineers are looking at the guts of the email program and cleaning up the cruft, they will also disable long unused email addresses. This will result in higher unknown users for some senders.
What’s interesting to me is that the reports are somewhat sporadic. Some senders are seeing a huge percentage of bounces, some are seeing the normal percentage. I expect this difference isn’t anything more than how actively a sender purges based on engagement. Senders that purge unengaged addresses are going to have already removed a lot of the addresses Yahoo! is now purging from their database. Senders that keep sending to their whole list, are going to see a lot of unknown user bounces.
I’ve asked a few folks and people who’ve responded told me that spot checks showed all the addresses turning up as invalid had no engagement for long periods of time.
If you are seeing a lot of bounces at Yahoo! over the last few days, you need to remove those addresses from your lists. I also recommend looking at the engagement statistics of these newly purged recipients. This will tell you, approximately, what an abandoned address profile looks like. You can use that information to make good decisions about purging unengaged users at other ISPs as well. Not only does this lower costs, because you’ll be sending to less non-responsive email addresses, it will also improve delivery at many ISPs.

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Goodbye Mr. Ebert

The Chicago Sun Times announced earlier today that Roger Ebert passed away today. Mr. Ebert was a legendary film critic, who hosted multiple shows over the last few decades.
His influence wasn’t just in the film arena, though. Mr. Ebert was an active participant online. In fact it was Roger Ebert, in 1996 at the Conference of World Affairs in Boulder Colorado, that coined “The Boulder Pledge.”

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Marketo files for IPO

Marketo filed documents for a $75M IPO yesterday.

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Maybe the sky is only falling a little bit

There was quite a bit of breathless reporting last week about the DoS against Spamhaus and how it was large enough to break the Internet. As the postmortem has gone on, a few things are becoming clear.

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Post-mortem on the Spamhaus DOS

There’s been a ton of press over the last week on the denial of service attack on Spamhaus. A lot of it has been overly excited and exaggerated, probably in an effort to generate clicks and ad revenue at the relevant websites. But we’re starting to see the security and network experts talk about the attack, it’s effects and what it tells us about future attacks.
I posted an analysis from the ISC yesterday. They had some useful information about the attack and about what everyone should be doing to stop from contributing to future attacks (close your open DNS resolver). The nice thing about this article is that it looked at the attack from the point of view of network health and security.
Today another article was published in TechWeekEurope that said many of the same things that the ISC article did about the size and impact of the attacks.
What’s the takeaway from this?

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Internet Storm Center on the Spamhaus DOS

The Internet Storm Center (ISC) has a blog post up discussing the DOS attack against Spamhaus. They do confirm they saw traffic approaching 300Gbps against Spamhaus. They also point out that most people probably never knew.

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Spamhaus answers about the recent DoS attack

Answers about recent DDoS attack on Spamhaus

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More on the attack against Spamhaus and how you can help

While much of the attack against Spamhaus has been mitigated and their services and websites are currently up, the attack is still ongoing.  This is the biggest denial of service attack in history, with as much as 300 gigabits per second hitting Spamhaus servers and their upstream links.
This traffic is so massive, that it’s actually affecting the Internet and web surfers in some parts of the world are seeing network slowdown because of this.
While I know that some of you may be cheering at the idea that Spamhaus is “paying” for their actions, this does not put you on the side of the good. Spamhaus’ actions are legal. The actions of the attackers are clearly illegal. Not only is the attack itself illegal, but many of the sites hosted by the purported source of the attacks provide criminal services.
By cheering for and supporting the attackers, you are supporting criminals.
Anyone who thinks that an appropriate response to a Spamhaus listing is an attack on the very structure of the Internet is one of the bad guys.
You can help, though. This attack is due to open DNS resolvers which are reflecting and amplifying traffic from the attackers. Talk to your IT group. Make sure your resolvers aren’t open and if they are, get them closed. The Open Resolver Project published its list of open resolvers in an effort to shut them down.
Here are some resources for the technical folks.
Open Resolver Project
Closing your resolver by Team Cymru
BCP 38 from the IETF
Ratelimiting DNS
News Articles (some linked above, some coming out after I posted this)
NY Times
BBC News
Cloudflare update
Spamhaus dDOS grows to Internet Threatening Size
Cyber-attack on Spamhaus slows down the internet
Cyberattack on anti-spam group Spamhaus has ripple effects
Biggest DDoS Attack Ever Hits Internet
Spamhaus accuses Cyberbunker of massive cyberattack

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Some content is just bad; but it doesn't have to be

There are a few segments in the marketing industry that seem to acquire senders with bad mailing practices. Nutraceuticals, male performance enhancing drugs, short term or payday loans and gambling have a lot of senders that treat permission as optional. The content and the industry themselves have garnered a bad reputation.
This makes these industries extremely difficult for mailers who actually have permission to send that content to their recipients. Working with this kind of sender, sometimes it seems impossible to get mail delivered to the inbox, no matter what the level of permission. Even when it’s double confirmed opt-in with a cherry on top, all the care in the world with permission isn’t enough to get inbox delivery.
This doesn’t have to be the case. Look at the porn industry. Early on in the email marketing arena there was a lot of unsolicited image porn. A Lot. So much that complaints by recipients drove many ISPs to disable image loading by default. The legitimate porn companies, though, decided unsolicited image porn was bad for the industry as a whole. Porn marketers and mailers adopted fairly strong permission and email address verification standards.
It was important for the porn marketers that they be able to prove that the person they were mailing actually requested the email. The porn marketers took permission seriously and very few companies actually send photographic porn spam these days. Even the “Russian girls” spam doesn’t have not safe for work images any longer.
Because of their focus on permission, in some cases revolving around age of consent in various jurisdictions, the porn industry as a whole is not looked at as “a bunch of spammers.” Porn content isn’t treated as harshly as “your[sic] pre-approved for a wire transfer” or “best quality drugs shipped overnight.”
Just having offensive content isn’t going to get you blocked. But having content that is shared by many other companies who don’t care about permission, will cause delivery headache after delivery headache. This is true even when you are the One Clean Sender in the bunch.
 

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Questioning standards

M3AAWG publishes documents summarizing and discussing current practices for stopping and preventing abuse. Some of these documents are focused on ISPs while others are focused on marketers. While M3AAWG is not directly nor officially a standards body, most of the documents have been written by members and reflect the best current practices for that document.
Members have been asked to leave the organization and some companies are denied membership because they are not in line with the organizational values. Some of these companies are ESPs or marketers, but some of these companies have been ISPs as well.
The standards written by M3AAWG are challenging for a lot of marketers to follow. These standards are written with the input of senders, but they all comply with the M3AAWG mission of stopping messaging abuse. Many ISPs believe that unsolicited email is abuse, thus M3AAWG standards say that all mail needs to be sent to recipients who request that mail. Purchasing lists, selling lists, and appending email addresses are all unacceptable activities for M3AAWG members.
I never really had much concern about the effectiveness of the M3AAWG process. Most of the big industry players are there and many of the ISPs have an aggressive anti-abuse attitude.
But last week I saw a blog post on a fairly major industry blog that listed a bunch of (made up, tasteless and sexist) things “overheard” at the recent M3AAWG conference (it’s been removed and I wouldn’t link to it anyway). The blog post made it look like no real work gets done at M3AAWG and that the attendees don’t work at the conference. I won’t claim that it’s a staid and quiet conference, but most attendees work very hard during the day.
The next day, the author tweeted:

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