Simple Mail Transfer Protocol (SMTP) is the lingua franca used by mail servers to communicate with each other, in the process of sending and receiving email messages. Here's a greatly overs…
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Here is the scenario. Maybe you've just gotten a bounce message that looks like this: Aug 25 11:20:24 s1 postfix/smtp[26906]: 98299221BB: to=<x@gmail.com>, relay=gmail-…
Last week I talked about one-click unsubscribe and why I don't think it's a great process. Basically, my concern is bot clicks. I've seen it happen too many times --…
The Friendly From is not quite its own separate header, but it is a field in your from header. It is the text that goes next to your email address in the from header. If the fro…
Do you block email signup attempts from role accounts? If not, I think you should consider it. What's a role account, you might ask? It's an email that has a username p…
Need a "common sense" breakdown showing you what characters should be allowed in the username part (local part) of an email address? This handy guide from Jochen Topf c…
