“Bad hostname or network address: localhost :10026” error appears in the maillog when starting Postfix

- Updated:
- 11 Oct 2017
- Product/Version:
- InterScan Messaging Security Suite 7.1 Linux
- InterScan Messaging Security Suite 9.1 Linux
- InterScan Messaging Security Virtual Appliance 8.2
- Interscan Messaging Security Virtual Appliance 8.5
- InterScan Messaging Security Virtual Appliance 8.5
- Platform:
- Linux - Red Hat RHEL 4 32-bit
- Linux - Red Hat RHEL 5 32-bit
- Linux - Red Hat RHEL 5.1 32-bit

Summary

When starting Postfix, you receive an error message in the maillog similar to the following:

Jan 01 HH:MM:SS HOSTNAME postfix/master[#####]: fatal: /etc/postfix/master.cf: line ##: bad hostname or network address: localhost :10026

Details

You encounter the error because Postfix is unable to resolve the localhost.

To resolve the issue, check the /etc/hosts file and make sure that the localhost address is 127.0.0.1.

For example:

127.0.0.1 hostname.localdomain HOSTNAME localhost localhost.localdomain

Rating:

Category:

Troubleshoot

Solution Id:

1095464

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