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...
It's a common question that we receive here at Mailgun about SMTP port numbers. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun offers multiple SMTP port options, but which one should you use to send email messages? We’ll take a historical look at each SMTP...