There is a MySQL postfix database and all postfix config are generally in /etc/postfix.
Most paths are stored in /etc/postfix/main.cf
# postfix config file
# uncomment for debugging if needed
# postfix main
mail_owner = postfix
setgid_group = postdrop
delay_warning_time = 4...
Checking HELO/EHLO names is recommended by the SPF RFC. Publishing records for these hostnames is an important part of the SPF protocol. HELO/EHLO is used when Mail from is <> even if a receiver does not do 100% HELO checking.
Publishing a HELO/EHLO rule involves creating an SPF record linked...
The bounce back level in an email indicates the overall condition of your database list. A high bounce rate indicates that your email list contains several invalid addresses. These addresses will never receive your email. More importantly, the high number of bounce back emails will affect the...