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Configure postfix as a backup for Exchange

Problem:

  • I want to use postfix on a virtual server as a backup incase my Exchange is down. Postfix should accept every mail and deliver it to the Exchange server instantly or wait until the Exchange server is available.

Requirements:

  • Existing postfix installation
  • Existing Exchange installation

  • Login to your virtual server via ssh.

  • Create and open the file /etc/postfix/transport
  • Insert domain.com smtp:exchangehost.name
  • Run postmap /etc/postfix/transport

  • Edit /etc/postfix/main.cf
  • Insert relay_domains = domain.com
  • Run /etc/init.d/postfix reload
  • tutorial/mail/postfixredir.1376778789.txt.gz
  • Last modified: 2018-06-03 14:10
  • (external edit)