1 Topic by jagter6

  • jagter6
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Topic: E-Mail Domain Same as Server Domain ?

HI,

In the installation, it is cautioned NOT to have the mail domain the same as the server domain FQDN, because Postfix can't handle it.

Exactly what will not work?

If I just want to host a single mail domain,do I really need another domain just for the server FQDN?

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: E-Mail Domain Same as Server Domain ?

jagter6 wrote:

Exactly what will not work?

Some applications (e.g. cron jobs) will generate some emails sent to local system user (e.g. root), the recipient address is like "root@<HOSTNAME>".

if you use server hostname as a virtual mail domain, Postfix will query "root@<HOSTNAME>" from SQL/LDAP, and failed. This causes you cannot receive emails sent to system user.

jagter6 wrote:

If I just want to host a single mail domain,do I really need another domain just for the server FQDN?

YES. Use the sub-domain is fine.

For example, your mail domain name is 'example.com', then use 'mail.example.com' as server hostname (and it must be resolvable by DNS query).