Showing posts with the label abuse prevention

Microsoft to limit sending from onmicrosoft.com

When you spin up a Microsoft 365 environment to handle email for your corporate or other organization, the system assigns you a default email domain that looks like something.onmicrosoft.com. This subdomain (with your Microsoft environment tenant name in it) is meant as a placeholder until you set up your real domain name for email. It gives admins a test platform to do a bit of email sendi…
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F2F Spam: From Antiquity to Modern Times

Remember Formmail? Spam fighters and email administrators of a certain age probably remember the bad old days of “ formmail ” spam. Formmail was a popular Perl script that let websites implement simple “contact us” forms. The problem? It was easily abused. The destination addr…

ESP Abuse/Spam Contact List

There are useful tools out there that can help you figure out where to send a spam report to. I use the ARIN Regional Internet Registry and abuse.net  nearly every day to look up spam reporting (abuse) contacts for IP addresses and domains. Some folks use SpamCop (which histo…

ISPs: Preventing Outbound Spam?

Kris writes, "Hi Al, I am contacting you because I would like to receive some feedback (advice, tips) on how an ISP can help to prevent outbound spam. "I work for an ISP in the Netherlands. Inbound spam isn't much of a problem for us, this is usually handled well …