Microsoft using Spamhaus Lists

An on the ball reader sent me a note today showing a bounce message indicating microsoft was rejecting mail due to a Spamhaus Blocklist Listing.
5.7.1 Client host [10.10.10.10] blocked using Spamhaus. To request removal from this list see http://www.spamhaus.org/lookup.lasso (S3130). [VE1EUR03FT043.eop-EUR03.prod.protection.outlook.com]
The IP in question is listed on the CSS, which means at a minimum Microsoft is using the SBL. I expect they’re actually using the ZEN list. ZEN provides a single lookup for 3 different lists: the SBL, XBL and PBL. The XBL is a list of virus infected machines and the PBL is a list of IPs that the IP owners state shouldn’t be sending email. Both of these lists are generally safe to use. If MS is using the SBL, it’s very likely they’re using the other two as well.
 

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Help! We're on Spamhaus' list

While trying to figure out what to write today, I checked Facebook. Where I saw a post on the Women of Email group asking for help with a Spamhaus listing. I answered the question. Then realized that was probably useable on the blog. So it’s an impromptu Ask Laura question.

We’re listed on Spamhaus’ list, any advice on how to get off? Our email provider has a plan, just looking for more input. 
If you’re on the SBL, there’s a problem (somewhere) with your data collection process. You’re getting addresses that don’t actually belong to your customers / subscribers / whatever.
The fastest way off it to cut WAY back on who you are mailing to. Mail only to addresses you know, for sure, based on activity in the email, want your mail. Then you can start to go through the other addresses and make decisions about how to verify that those addresses belong to the people you think they do.
If you’re at an ESP, do what they tell you to do. Most ESPs have dealt with this before.
One thing to think about, once you get past the crisis stage, is that if you’re on the SBL, it’s likely your delivery is overall pretty bad. These aren’t folks that dramatically list for a single mistake, there’s a pattern. ISPs look at different patterns, but will often find the same answers and delivery will be bad.
It’s important to realize that Spamhaus has 4 or 5 different lists that have different listing criteria. This is for the SBL, there’s also CSS, CBL, PBL, DBL and XBL. They address different problems and have different listing and delisting criteria.

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What's going on with your SBL listing?

This popped up on my Facebook memories this morning. I don’t post about client events very often, but given I can’t remember even what client this is, I don’t think I’m revealing too much info.
FB memory from a few years ago.

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What kind of mail do filters target?

All to often we think of filters as a linear scale. There’s blocking on one end, and there’s an inbox on the other. Every email falls somewhere on that line.
Makes sense, right? Bad mail is blocked, good mail goes to the inbox. The bulk folder exists for mail that’s not bad enough to block, but isn’t good enough to go to the inbox.
Once we get to that model, we can think of filters as just different tolerances for what is bad and good. Using the same model, we can see aggressive filters block more mail and send more mail to bulk, while letting less into the inbox. There are also permissive filters that block very little mail and send most mail to the inbox.
That’s a somewhat useful model, but it doesn’t really capture the full complexity of filters. There isn’t just good mail and bad mail. Mail isn’t simply solicited or unsolicited. Filters take into account any number of factors before deciding what to do with mail.

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