Denying bad DNS HELO/EHLOs
Changelog Aug 17, 2023- C++ version Aug 13, 2023- v. 8.2.0 bug fix: segfault in case of no result in DNS record- default action changed to GNLR Jul 27, 2023- P will now pass through making all filters ignored. You are invited to remove this option...
Installing a Let's Encrypt certificate for your qmail, dovecot and apache servers
Changelog Aug 6, 2023The certificates installation is now based on dehydrated. The previous documentation based on certbot will be left as is at the bottom of this page, but it won't be updated anymore. May 18, 2023added the option --key-type rsa to the...
Configuring the Sender Rewriting Scheme (SRS) on qmail
open-spf.org libsrs2 site Marcelo Coelho's patch for qmail SPF "breaks" email forwarding. SRS is a way to fix it. SRS is a simple way for forwarding MTAs to rewrite the sender address. Configuration Configure srsfilter, so that it will be called when an email for the...
Greylisting for qmail
Greylisting is a method of defending e-mail users against spam. A mail transfer agent (MTA) using greylisting will "temporarily reject" any email from a sender it does not recognize. If the mail is legitimate, the originating server will try again after...
