Top MAGY Domains

Sometimes it is handy to have a list of the top MAGY (Microsoft, AOL, Google, Yahoo) email domains. Here's what I've compiled based on current and prior research, plus input from readers.

AOL and Yahoo are merging, but I've left them distinct for now. Also, some of these domains might not be common email domains, but they all seem to have valid MX records and thus if you're looking for a list of domains to, for example, exempt from validity checking so that they never falsely appear to be dead domains, it'll still come in handy.

If you use this to group domains to count sending mail volume by ISP, it will be slightly imperfect, as I've included the corporate domains (microsoft.com, google.com, teamaol.com, oath.com, yahoo-inc.com) that may use separate mail systems. However, your send volume to those domains is probably pretty low compared to the consumer mailboxes, so for "back of napkin" kind of math in a pinch, it might do just fine.

Note that the intent here is to list email domains owned and used by that given provider; not to list every possible customer domain that points at the ISP's mail servers. I'm not capturing Google Apps domains, Yahoo Business Hosting domains, or anything like that. That's out of scope for this exercise.

Feedback and domain updates welcome.


Domain ISP
aim.com
AOL
aol.at
AOL
aol.ch
AOL
aol.co.uk
AOL
aol.com
AOL
aol.com.ar
AOL
aol.com.au
AOL
aol.com.mx
AOL
aol.de
AOL
aol.fr
AOL
aol.it
AOL
aol.jp
AOL
aol.nl
AOL
aol.se
AOL
compuserve.com
AOL
cs.com
AOL
games.com
AOL
goowy.com
AOL
huffingtonpost.com
AOL
huffingtonpost.it
AOL
love.com
AOL
netscape.net
AOL
teamaol.com
AOL
wild4music.com
AOL
wmconnect.com
AOL
wow.com
AOL
ygm.com
AOL
autoblog.com
AOL
oath.com AOL
google.com Google
gmail.com
Google
googlemail.com
Google
hotmail.co
Microsoft
hotmail.co.uk
Microsoft
hotmail.com
Microsoft
hotmail.de
Microsoft
hotmail.dk
Microsoft
hotmail.eu
Microsoft
hotmail.fr
Microsoft
hotmail.it
Microsoft
hotmail.net
Microsoft
hotmail.org
Microsoft
hotmail.se
Microsoft
live.co
Microsoft
live.co.uk
Microsoft
live.com
Microsoft
live.de
Microsoft
live.dk
Microsoft
live.eu
Microsoft
live.fr
Microsoft
live.it
Microsoft
live.net
Microsoft
live.org
Microsoft
live.se
Microsoft
microsoft.co
Microsoft
microsoft.co.uk
Microsoft
microsoft.com
Microsoft
microsoft.de
Microsoft
microsoft.dk
Microsoft
microsoft.fr
Microsoft
microsoft.it
Microsoft
microsoft.net
Microsoft
microsoft.nl
Microsoft
microsoft.org
Microsoft
microsoft.se
Microsoft
microsoftonline.com
Microsoft
msdn.com
Microsoft
outlook.co
Microsoft
outlook.com
Microsoft
outlook.com.au
Microsoft
outlook.de
Microsoft
outlook.dk
Microsoft
outlook.eu
Microsoft
outlook.fr
Microsoft
outlook.it
Microsoft
outlook.org
Microsoft
outlook.se
Microsoft
skype.de
Microsoft
skype.dk
Microsoft
skype.fr
Microsoft
skype.it
Microsoft
skype.se
Microsoft
citlink.net
Yahoo
frontier.com
Yahoo
frontiernet.net
Yahoo
nl.rogers.com
Yahoo
rocketmail.com
Yahoo
rogers.com
Yahoo
sky.com
Yahoo
y7mail.com
Yahoo
yahoo.ca
Yahoo
yahoo.cl
Yahoo
yahoo.co.id
Yahoo
yahoo.co.in
Yahoo
yahoo.co.jp
Yahoo
yahoo.co.kr
Yahoo
yahoo.co.nz
Yahoo
yahoo.co.th
Yahoo
yahoo.co.uk
Yahoo
yahoo.com
Yahoo
yahoo.com.ar
Yahoo
yahoo.com.au
Yahoo
yahoo.com.br
Yahoo
yahoo.com.cn
Yahoo
yahoo.com.co
Yahoo
yahoo.com.hk
Yahoo
yahoo.com.mx
Yahoo
yahoo.com.my
Yahoo
yahoo.com.ph
Yahoo
yahoo.com.sg
Yahoo
yahoo.com.tr
Yahoo
yahoo.com.tw
Yahoo
yahoo.com.ve
Yahoo
yahoo.com.vn
Yahoo
yahoo.de
Yahoo
yahoo.dk
Yahoo
yahoo.es
Yahoo
yahoo.fr
Yahoo
yahoo.gr
Yahoo
yahoo.ie
Yahoo
yahoo.in
Yahoo
yahoo.it
Yahoo
yahoo.nl
Yahoo
yahoo.no
Yahoo
yahoo.pl
Yahoo
yahoo.ro
Yahoo
yahoo.se
Yahoo
yahoo-inc.com Yahoo
ybb.ne.jp
Yahoo
ymail.com
Yahoo

Holiday Season is Here: What to do

Hey big sender, it's that time of the year again! Lots of companies generate lots of revenue during the run up from about now until Christmas, and email is a very important channel for them to do that.

That's why it's important for senders to follow these five deliverability recommendations to ensure they minimize deliverability issues during this important time.

  1. Don't experiment. Now is not the time to try methodology that is untried and unsure. If something goes wrong, it will take some time to fix, and that is time during which you won't be able to reach your most important customers. I always tell people: If you drive for 4 days in the wrong direction, it's going to take you at least 4 days to get back to where you started. Then another 4 days to get to where you thought you were going, now that you're driving in the right direction. A similar principle applies to fixing email delivery issues. If you do something that damages your reputation, the fix is going to involve time and a journey. There's no magic reset button here. ISP reputation is (typically) based on a rolling 30 day window, so it can take a month to fully clear away bad stats after you've cleaned up your act after a failed experiment.
  2. Don't dig deep. Now isn't the time to break out the ten year old buyers file for the first time. Instead, you should already have an ongoing strategy to re-engage dormant past customers, and be willing to let them go if they're just not interacting with your email messages. Digging deep has two big risks: Spamtraps, and low engagement. Spamtraps in this case being addresses that are no longer valid, having been repurposed into warning systems that feed into spam filters. That'll get you blocked or blacklisted. Even if everybody did all opt-in and all addresses are valid, mailing to people who aren't interested drags your engagement stats down, which eventually leads to spam folder placement.
  3. Don't fire up a bunch of new IP addresses. New IP addresses have no historical reputation, so ISPs are suspicious of them. When you have a new IP address, you need to build up volume slowly over the first 4-5 weeks of sending to build up a good reputation and maximize the chances of good inbox placement. At this point, this is something you should have started a month or two ago. And note that there is no magic switch at ISPs to bypass IP address warming. They want to see that history and many are skeptical of claims that the sender is a good guy -- too many "good guys" have gotten caught spamming in the past.
  4. Do put your best foot forward. If you're using your regular IP addresses that you've used for the past year, if you're signing all mail with DKIM authentication, if you're retiring un-engaged subscribers after a period of time, you're well positioned for inbox success. Stay the course.
  5. Be careful about adding extra volume. Maybe you email everybody once a month, usually, but perhaps you email them twice a week around the last couple of weeks in November. Don't just jump from sending 500,000 in one month to sending 2,500,000 the next month. You need to build up to it. Try not to do more than double your volume week over week. And be prepared that emailing those same people multiple times, while it may make you more money, may also cause subscriber fatigue and drive lower engagement stats. Which, in turn can cause spam foldering. There's a fine line to walk here to do it right.
  6. (Bonus tip!) Don't expect miracles after midnight. You got blocked at Hotmail on a Saturday night? You might be able to get your deliverability consultant on the phone, but Hotmail support doesn't work on weekends. There's only so much we can do for you after hours. And keep in mind that the fix for most ISPs is to clean up your data, not to have me make a phone call.

The same rules here that you already know apply here: You have to send truly wanted mail, only to people who have signed up for it. ISPs don't provide exceptions for the holiday season, and indeed, remediation can be even harder than usual because the ISPs are dealing with extra mail, extra spam, extra unblocking requests, and extra grumpiness. Marketers are likely to have more success by staying off of the ISPs' naughty lists.

October 11: Spam in the News

Wondering if government action against spammers still happens? Here's an example from the UK. MediaPost's EmailMarketingDaily reports that "two UK firms were fined thousands of pounds by the Information Commissioner’s Office (ICO) for allegedly spamming consumers." Read all about it here.

HTML Email: JWZ's fault?

One-time Netscape Navigator developer Jamie Zawinski suggests that HTML support in email might have been his fault.

Whoops: iOS 11 Mail Microsoft Issues

If you've upgraded your iPhones to the just-released iOS version 11 and your email is hosted by Microsoft's Outlook.com, Office 365 or Exchange 2016, you may now find yourself unable to send email from your iPhone. It sounds like a known issue and that it is being worked on.

In the mean time, the most commonly suggested workaround seems to be that you should download Microsoft's Outlook email client for iOS and use that instead.

Full Email Headers

Email message headers have a lot of information in them. Only the tiniest amount of that header information is typically exposed to a recipient by default. There's much more to it than just the from address, to address, subject line and date. There's routing information, authentication information, IP address information, and more information hiding just beneath the surface, in the "full headers" or "internet headers" of that email message. To get at the rest of that header information associated with a given email message, a recipient will need to "view full headers" or "view the message source."

Here's a guide from MXToolbox on how to get full email header information from various email clients.

Google explains how to obtain full headers from Gmail, and even shows you how to extract valuable information from them.

Microsoft explains how to obtain full headers from various versions of the Outlook email client.

Pro tip: When somebody asks you to send them email headers, don't send them a screen shot of the from address or email body. That's not what they're asking for. (And screen shot images aren't searchable; if somebody is trying to help you troubleshoot something, it is painful to have to manually read each line of a header in an image to try to find the right header.) Instead, send them a text file attachment containing all of the copied-and-pasted email header info, or full message source.

Hotmail UK MX Change

The MX servers for Hotmail UK changed in DNS overnight. For those who are caching DNS or have hard coded DNS entries, you're going to run into problems with false positive "user unknown" bounces. Time to flush the cache and make sure you're relying on what's currently in DNS.

I'd include the specific domains here, and their new MX records, but I don't want to lead people down the wrong path of hard coding MX record entries, when they really should be relying on DNS.

Haiku Break

So, what do we do?
Deliverability!
How? Nobody knows!
-- Courtesy of my friend Sarah