Showing posts with the label mailop

DELIVTERMS: Mailop

It's time for another entry in the DELIVTERMS series here on Spam Resource, where we define deliverability and email technology terms to help make them easier for email senders to understand. Today, we're leaning toward the operational, in that the term we're defining is: Mailop . What is Mailop? Mailop is an email operations-specific email discussion list, meant to allow emai…
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Infrastructure update: talktalk.net and tiscali.co.uk

An administrator from Open-Xchange recently posted to the Mailop list that they will be taking over mail handling for British internet provider TalkTalk, including the domains talktalk.net and tiscali.co.uk. This means that mail from these domains will be sending from new IP …

Validity to restrict access to reputation data via DNS

Validity (and before that, Return Path) has long offered access to various bits of reputation data to email users via DNS, primarily utilized via a particular  SpamAssassin plugin . Checks include whether or not an IP address is on the Validity Certification whitelist, on the &…

Honestly? Don't send to Gmail over IPv6

Yes, some people do it, and yes, for some people, it works fine. But..... If you're standing up a new server and it has an IPv6 IP address, and it has no sending reputation, you'll find it very hard to get mail reliably delivered to Gmail inboxes. You're starting wi…

Cisco PIX/ASA: Disable SMTP Fixup

Over on the Mailop list, a postmaster shared his tale of woe involving sending mail to a small set of recipients whose mail server is behind a Cisco PIX firewall. You can tell if a receiving site is using a Cisco PIX firewall by telnetting to port 25 of the site's MX and s…