SMTP Relay Configuration for Postfix Based System

Follow these steps to configure your Postfix based system to use Nexiwave Email Relay service.

(This is prepared based on RedHat/CentOS based systems. Similar steps should work for other Linux flavours)

Preparation

• Your system is already configured Postfix.
• You can already send voicemails as emails.

Steps

1. Configure /etc/postfix/sasl_passwd:
• Add your Nexiwave username and password to /etc/postfix/sasl_passwd:
  smtp.nexiwave.com username:password
  Note: you can obtain additional username/password for your Nexiwave account from "Additional Credentials" page (Login -> Settings -> Additional Credentials).
• Create the hash db file for Postfix by running the postmap command:
  postmap /etc/postfix/sasl_passwd
2. Configure /etc/postfix/main.cf:
• Update the relayhostparameter to smtp.nexiwave.com:
  # specify SMTP relay host
  relayhost = smtp.nexiwave.com:587
• At the end of the file, add the following parameters to enable authentication:
  # enable SASL authentication
  smtp_sasl_auth_enable = yes
  # disallow methods that allow anonymous authentication.
  smtp_sasl_security_options = noanonymous
  # where to find sasl_passwd
  smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
  # Enable STARTTLS encryption
  smtp_use_tls = yes
  # where to find CA certificates
  smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
3. Restart Postfix:
   service postfix restart