Relayhost - specify port inside or outside the brackets?

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Relayhost - specify port inside or outside the ...
\ Charles Marcus (30 Apr 2007)
. \ Ralf Hildebrandt (30 Apr 2007)
. \ mouss (30 Apr 2007)
. . \ Charles Marcus (30 Apr 2007)
. \ Noel Jones (30 Apr 2007)

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Subject:	Relayhost - specify port inside or outside the brackets?
Group:	Postfix-users
From:	Charles Marcus
Date:	30 Apr 2007

Hello,

I've seen this referenced both ways. In the comments of main.cf, it says:

# In the case of SMTP, specify a domain, host, host:port, [host]:port,
# [address] or [address]:port; the form [host] turns off MX lookups.

So - which should it be?

host:port

or

[host]:port

Thanks,

--

Best regards,

Charles