Product category:
Email marketing
News Release from: Lyris UK | Subject: EmailAdvisor ISP Deliverability Report
Edited by the Marketingservicestalk Editorial
Team on 05 September 2007
Email sender authentication checks on
the rise
A new email deliverability study from Lyris signals an increasing reliance on the Sender Policy Framework authentication method to determine whether the email is legitimate and should be delivered.
This means that marketers should make sure their SPF records are up to date if they want to maintain their inbox delivery rates for their permission-based messages That's a key finding of Lyris' EmailAdvisor ISP Deliverability Report Card for Q2 2007, a quarterly research study that monitors deliverability rates for permission-based email marketing messages
This article was originally published on Marketingservicestalk on 7 Jun 2007 at 8.00am (UK)
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The study measured the full delivery trajectories of more than 436,000 permission-based email marketing messages using ISP domains in the United States, Canada, Europe and Australia.
According to the study, permission-based email messages make it to US ISP inboxes roughly 75 per cent of the time.
AIM.com led the pack with 97 per cent inbox delivery, a full 10 percentage points higher than second place RoadRunner SoCal - both of which didn't even make the top ten last quarter.
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Rounding out the top performers - all achieving inbox delivery rates higher than 80 percent - are Verizon, USA, Compuserve, IWon, AOL, Juno, Mac and Netzero.
But for marketers looking for ways to improve inbox deliverability, the most relevant finding from this quarter's report is the appearance of SPF authentication checks in the list of the top ten content triggers that ISPs check, according to Stefan Pollard, Director of Consulting Services at EmailLabs, which along with JL Halsey's Lyris and Sparklist brands has integrated with the EmailAdvisor deliverability monitoring tool.
"This is the first time we've seen SPF checks start to creep into content filter tests, which means that receivers are starting to verify that a sender's SPF authentication record is accurate," said Pollard.
"This is new - and the good news is that it's an easy fix for marketers - in fact, it's completely in the sender's power to make sure the records are accurate at all times.
"Don't assume it's the responsibility of your system administrator.
"If you're responsible for the email program, you need to realise the importance and test it yourself".
Failing an SPF check carries a heavy penalty - 2.6 points (from the current SpamAssassin test) on a Bayesian scale that identifies a message as spam when it reaches 3.0 points or higher.
That's more than double the penalty for any of the other top ten spam triggers identified.
SPF checks compare the sender's return path domain and the IP address to a list of approved IPs the sender includes in their DNS zone.
The company in charge of a domain (for example, @Lyris.com) must keep the list of approved IPs up to date.
A common - but easily rectified - reason for failing an SPF check is when a company changes IP addresses or email service providers, but doesn't update its SPF records.
To find out if they would pass or fail an authentication check, marketers can simply look at their message headers in the major web-based email platforms (Hotmail, Gmail, Yahoo, etc).
The header should read "SPF PASS", or for domain keys either display a trust icon or the key check results.
According to Dave Dabbah, Vice President of Marketing for Lyris, between the Q1 and Q2 surveys, there's been a decrease in image spam and an increase in spam that uses PDF, PowerPoint and Excel files.
"It's important for email marketers to keep track of spam trends, because as spammers change the way they attack, the ISPs change the way they monitor and filter individual messages," said Dabbah.
"PDFs and other files may have been safe a year ago, but today they'll attract a higher spam score, and next quarter the scoring will change yet again.
"This is why it's important to use a deliverability monitoring tool that's able to test every campaign according to the latest requirements and protocols".
Marketers sending permission-based emails to US-based ISPs still land in the junk/bulk folder almost 16 per cent of the time.
XO Concentric far exceeds any other ISP - banishing 56 per cent of invited email to the junk/bulk folder.
Next in line are SBC Global and Bell South, both junking 30 per cent of permission-based email, and Yahoo at 26 per cent.
MSN Network, GMail and Hotmail all come in at 18 per cent.
Rounding out the top ten are PeoplePC, USA and Earthlink.
At the other end of the spectrum - AOL only delivered 1.94 percent to the junk/bulk folder.
Marketers sending to European ISPs face even more trouble.
More than 20 percent of permission-based emails were sent to the junk/bulk folder - that's almost three times more than last quarter.
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