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“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
    • 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
Public

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

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Rating:
Category:
Troubleshoot
Solution Id:
1095464
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