I have been struggling to get an email server setup and working by following many guides online. Here is how I got it working. I had to use Gmail as an relayhost to actually send the email from the server because my ISP blocks me from sending mail on port 25 and doesn’t allow me to relay mail through their servers because I’m using instead of )
Software: postfix and dovecot
Operating System: CentOS and Archlinux
(CentOS users need to install cyrus-sasl-plain also )
SASL Configuration
Modify or create: /usr/lib/sasl2/smtpd.conf
pwcheck_method:saslauthd
saslauthd_path: /var/run/saslauthd/mux
SASLAUTHD_OPTS=”${SASLAUTH_MECH} -a pam”
mech_list: plain login
log_level: 7
Dovecot Configuration
Copy the dovecot configuration files :
# cp /usr/share/doc/dovecot/example-config/* /etc/dovecot/
Modify /etc/dovecot/dovecot.conf:
protocols = imap
Modify: /etc/dovecot/conf.d/10-auth.conf :
disable_plaintext_auth = no
Modify: /etc/dovecot/conf.d/10-mail.conf :
mail_location = maildir:~/Maildir
Create or Modify: /etc/pam.d/dovecot
auth required pam_unix.so nullok
account required pam_unix.so
Postfix Configuration
Modify /etc/postfix/main.cf:
myhostname = rusher81572.com
mydomain = rusher81572.com
myorigin = $mydomain
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost
relayhost = [smtp.gmail.com]:587
home_mailbox = Maildir/
smtp_use_tls=yes
smtp_sasl_auth_enable = yes
smtpd_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/password
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtp_sasl_security_options =
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,check_relay_domains
Create /etc/postfix/password:
[smtp.gmail.com]:587 username:password
#postmap /etc/postfix/password
#systemctl start postfix