Tagbounce handling

October 27, 2014

Three things marketers should do when domains are retired

By laura
2 Min read
1 comment
27October

A few weeks ago I was alerted to a domain change for INGDirect. The ingdirect.com domain is being retired and all users are migrating to the capitalone.com domain. As part of this change usernames are NOT being transferred, so if you have @ingdirect.com addresses on any B2B mailing list, you will need to drop those addresses and find the new contact information for the subscriber. What should...

April 10, 2014

Yahoo DMARC articles worth reading

By laura
2 Min read
1 comment
10April

There are a bunch of them and they’re all worth reading. I have more to say about DMARC, both in terms of advice for senders and list managers affected by this, and in terms of the broader implications of this policy decision. But those articles are going to take me a little longer to write. How widespread is the problem? Andrew Barrett publishes numbers, pulled from his employer, related...

February 27, 2013

Thoughts on bounce handling

By laura
4 Min read
1 comment
27February

This week’s Wednesday question comes from D. What are your thoughts on bounce handling There’s no specific standard for bounce handling as we often talk about it. While a lot of people will mention the RFCs, the RFCs only say what to do with a single email that gets a 4xy or a 5xy during the SMTP transaction. If the message gets a 5xy during the SMTP transaction, then the email MUST...

January 30, 2013

8 things that make your mail look like spam

By laura
4 Min read
2 comments
30January

In the comments of last week’s Wednesday question John B. asked Can you elaborate on specifics of “configure machines to not look like spam ware”? There are a lot of things that spamware does that is different from a lot of standard MTAs. Here are a list of things that may make your mail look like it is running spamware to a receiving server. Using weird values for HELO/EHLO, like a bare IP...

October 16, 2012

Retrying mail to AOL

By laura
1 Min read
1 comment
16October

I’m working on stuff for MAAWG so I’m really not all that up on what’s happening in the world of email recently. A lot of folks are commenting on my AOL post, and I’m hearing that queues are backing up and emptying as AOL makes changes. One thing people have been asking me is if they should retry mail to the addresses that are bouncing. I say yes, absolutely. Some of the...

July 30, 2012

Bounces, complaints and metrics

By laura
4 Min read
1 comment
30July

In the email delivery space there are a lot of numbers we talk about including bounce rates, complaint rates, acceptance rates and inbox delivery rates. These are all good numbers to tell us about a particular campaign or mailing list. Usually these metrics all track together. Low bounce rates and low complaint rates correlate with high delivery rates and high inbox placement. But sometimes the...

December 6, 2011

Bounce handling simplified

By laura
1 Min read
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06December

I am a strong believer that bounce handling should be designed to remove addresses that have no human on the other end while not removing addresses that have a real recipient on the other end. Bounce handling should be designed to appropriately manage your subscriber base. Delivery problems are the consequence if you don’t do that. They shouldn’t be the reason you bounce handle...

March 29, 2011

Just give it up already

By laura
2 Min read
5 comments
29March

I have a mail system totally separate from my inbox to use when I’m testing signup forms. Some of them are client, some of them are vendors my clients are thinking about using. In any case, it’s mail I’m seriously concerned won’t stop just by me opting out of it. The server hosting that mail system has been flakey lately, and needs to be hard power cycled to make it come...

February 8, 2010

AOL transmitting 4xx error for user unknown

By laura
1 Min read
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08February

AOL is currently returning “451 4.3.0 <invaliduser@aol.com>: Temporary lookup failure” in some cases when they really mean “550 user unknown.” This message from AOL should be treated as 5xx failure and the message should not be retried (if at all possible) and the failure should be counted as a hard bounce for list management purposes. This is something broken at...

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