Spam Resource: All Things Deliverability

Hey, Al! I was wondering if you could provide some guidance about SPF record format. Is it better to list the exact IP(s) in the SPF record? How about using the SPF dash (-all), or tilde (~all)? Which way is more common and better for deliverability? May, 2024 Update: My origin…

Over on the Kickbox blog , my colleague Jennifer Nespola Lantz talks about sending domains and what you need to think about if you want to share domains between multiple email provider platforms. It's a common thing, right? You are probably using more than one service pro…

It's always good to hear about growth of the good kind of spam. Hormel seems to be doing very well during these crazy times. From CNBC : “That’s incredible. We’ve had to announce new capacity that we’re going to bring online in 2023 to meet the demand, so Spam is as strong…

Ask Al: We're a restaurant that just opened. We signed up for an email service provider (ESP) platform and we're looking to buy email lists to get started. Where should we start? Hey! Thanks for reaching out, but I wanted to warn you that email list purchasing isn't…

I had a customer ask me yesterday, why is their ESP trying to force them to implement CAPTCHA on their signup forms? They're not spammers. Well, unfortunately, it's usually because of stuff like this: As Webbula's Jenna Devinney explains , bad guys can easily find a…

SocketLabs’ Brian Godiksen and Campaign Monitor’s Travis Hazlewood joined forces in this excellent blog post to explain what can go wrong when you use a subdomain (under a domain you don't own) to send mail. Example? Some registrars offer up this goofy thing where you can …

I can't tell if this article from Joe Queenan for the Wall Street Journal (paywall; sorry) is a joke or not. Relevant excerpt: "Just one example [of legitimate email going to the spam folder]: In recent years, a great deal of criticism has been leveled at the Swedish …

Per notification on the Mailop mailing list on November 24, 2021, "Tucows / OpenSRS is executing an upgrade that will result in new SMTP outbound IP addresses being used within the next couple weeks.

Back in November, Spamhaus reported on how somebody managed to send a bunch of forged email through real FBI email servers . Brian Krebs broke down how it happened : The email registration process involves sending out a one-time use token sent by the web server in question, but…

Hey! I know that people find the ISP domain guides useful, so I thought I'd fire up the blog machine to share info about our friends at American telecommunications company Comcast (Xfinity) and their various email domains. I'm not sure that everybody knows this informa…