Over at the Exacttarget blog, there is a guest post up from Annalivia who handles much of the sender support (and about 15 million other things) at AOL.
On the nights before Christmas…
when the relays are groaning under the loads
and ISP admins start to turn into toads
they tear out their hair and cry in despair
“why’s all this mail coming out of thin air?”
Head over to read the whole thing.
Part 3 in an ongoing series on campaign stats and measurements. In this installment, I will look a little closer at what other people are measuring about your email and how that affects your reputation at the ISPs.
Part 1: Campaign Stats and Measurements
Part 2: Measuring Open Rate
Reputation at the ISPs is an overall measure of how responsive recipients are to your email. ISPs also look at how much valid email you are sending. Anything the ISP can measure and use to distinguish good mail from bad is used in calculating reputation.
Some of the major metrics ISPs use include the following.
Invalid Address Rates
The ISPs count how much mail from any particular IP address is hitting non-existent addresses. If you are mailing a large number of email addresses that do not exist (550 user unknown), this is a suggestion that your address collection techniques are not very good. Responsible mailers do have the occasional bad address, including typos, expired/abandoned addresses, but the percentage in comparison to the number of real email addresses is low. How low is low? Public numbers suggest problems start at 10% user unknowns, but conversations with ISP employees show they consider lower levels a hint there may be a problem.
To calculate bounce rate ISPs take the total number of addresses that were for invalid accounts and divide that by the total number of addresses that the sender attempted to send mail to. Rates above 10% may cause significant delivery issues on their own, rates lower that 10% may still contribute to poor delivery through poor reputation scores.
Spamtraps
ISPs pay a lot of attention to how much mail is hitting their “trap” or “bait” accounts. There are a number of different sources of these trap accounts: old abandoned email addresses, addresses that never existed or even role accounts. Hits to a trap account tells the ISP there are addresses on your list that did not opt-in to receive mail. And if there are some addresses they know about that did not opt-in, it is likely that there are other addresses that did not opt in.
Spamtraps tend to be treated as an absolute number, not as a percentage of emails. Even a single spamtrap on a list can significantly harm delivery. According to the ReturnPath Benchmark report lists with a single spamtrap had nearly 20% worse delivery than lists without spamtraps.
This is spam clicks (FBL complaints)
Complaints from users are heavily used by ISPs. This tells them directly how many people are objecting to your email. In this case, permission is removed from the equation. Even if a sender has permission to send email, the recipient can say “no, I don’t want this, it is spam.” The ISPs put more weight on what their users tell them than on what the senders tell them.
RoadRunner announced changes to their FBL this morning. Everyone who is currently getting a FBL should have received an email. Important dates to remember include the following.
August 28: Existing RR FBL will be frozen. No changes to existing loops will be accepted and no new FBL applications will be processed. All current FBLs will continue to work.
November 17 (tentative): The new FBL will go live. Existing FBLs will not be converted from the old FBL to the new one. Everyone wishing to be a part of the new FBL will be required to re-enroll in the program beginning on this date.
December 31 (tentative): The old FBL ceases to exist.
More information about the migration is available at http://postmaster.rr.com/FBL.html
Last week Jon left a comment on my post Following the Script. He gives a familiar story about how he’s having problems contacting Yahoo.
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