There may have different methods to implement this feature. But I use the way from answer from serverfault. First, I have to install postfix-pcre in my debian/ubuntu system, Then, I defined a cleanup service in master.cf, Let’s update submission and smtps in master.cf to […]

When selecting an email domain, a meaningful name carries more weight than a generic one. Take aol.com, for instance, which stands for America Online – it’s a solid choice for email addresses because it’s easy to remember. In contrast, web.com falls short. While it […]

Though postfix is the most widely used MTA software on internet, it’s hard to find every detail for setup it correctly. For example, how to reject a sender domain in postfix? I took quite a few time to check the doc to get answers. […]

Here is the list I gathered. These email providers are still active on internet. They have a simple domain, like mail.xx or inbox.xx, which are easy to remember. Hope you like it.

The answer is provided by Alexander on postfix mailing list. SMTP-DANE Outgoing:# validate DANEsmtp_dns_support_level = dnssecsmtp_tls_security_level = dane   # or dane-only (https://www.postfix.org/TLS_README.html) Incoming: – setup DNSSEC for your domain (out of scope here on the postfix list) – publish TLSA recordse.g. https://www.sidn.nl/en/news-and-blogs/hands-on-implementing-dane-in-postfix (not everything there is […]