Continuation of the email antispam series, but this time I’ll explain what is Real-Time Blackhole List (RBL) and how it is used with DNS Blocklists (DNSBL)

I tried to block TikTok for my kid using NextDNS Parental Control, but that didn’t work out. In this post I will reveal the mystery of the blocking TikTok using DNS blocklist

The final article in the series. The definitive guide about sending emails that covers everything, from parsing recipient email and finding recipient SMTP server to ‘Email has been sent’ notification.

A new mindblowing discovery I made during the work on Postmoogle , but this time the finding will stay as a blog post only and won’t be actually implemented, because it’s a Pandora’s box of email.

I continue studying of SMTP and how email works and found out a big lie of 20th and 21st centuries! BCC doesn’t exist.

In one of the previous posts I mentioned a problem called greylisting. Let’s discuss it a bit further and add other annoying and shady anti-spam techniques that add headache and not protect you from spam.

We already discussed topics like SMTP components and email validation , so the next stop is how to actually compose an email message, including mandatory headers, to send a fully valid email straight into inboxspam.

Email validation is hard. Do you know how to validate an email address for sure? Neither do I, but here is a report on what I found while working on postmoogle

What are SMTP components and how SMTP servers implemented nowadays. Juggling with MUA, MSA, MTA, MDA and trying to understand why it’s so hard to understand.