Configure ElasticEmail with Postfix

To configure ElasticEmail with postfix, first install sasl support

On Debian/Ubuntu

apt-get install libsasl2-modules

On RHEL/CentOS

yum install cyrus-sasl-plain

Edit postfix config

vi /etc/postfix/main.cf

On Ubuntu/Debian, you need to comment the line starting with “relayhost”.

Add following

smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous
smtp_tls_security_level = encrypt
header_size_limit = 4096000
relayhost = [smtp.elasticemail.com]:587

Now create file

/etc/postfix/sasl_passwd

Add following content

[smtp.elasticemail.com]:587 YOUR_SMTP_USER:YOUR_SMTP_PASSWORD

You can find your SMTP user name and password from

https://elasticemail.com/account/#/settings/apiconfiguration

Now run

chmod 600 /etc/postfix/sasl_passwd
postmap /etc/postfix/sasl_passwd

Restart postfix with

systemctl restart postfix

Postfix will relay mails using postfix now.

See postfix