Tag: postfix
-
Disable SSLv3 in Postfix, Dovecot
Postfix: Disabling certain versions of SSL works like this in Postfix: In your /etc/postfix/main.cf add or modify the following config parameter like so: smtpd_tls_protocols=!SSLv2,!SSLv3 If you are using mandatory TLS you’ll want to set this instead: smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3 These should be fairly self-explanatory, but for further detail read the Postfix configuration parameters documentation. Do not forget […]
-
Postfix error – fatal: parameter “smtpd_recipient_restrictions”
I encountered this error when I added a check_sender_access clause to my smtpd_recipient_restrictions in postfixes “main.cf”: fatal: parameter “smtpd_recipient_restrictions”: specify at least one working instance of: check_relay_domains, reject_unauth_destination, reject, defer or defer_if_permit. I haven’t really checked, but I am guessing this is because smtpd_recipient_restrictions as the last clause isn’t specifically rejecting all mails that aren’t […]