Re: [exim] check_helo_slow?

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Author: Philip Hazel
Date:  
To: Tony Finch
CC: exim-users
New-Topics: Re: [exim] valid(ating) hostnames (was: check_helo_slow?)
Subject: Re: [exim] check_helo_slow?
On Mon, 10 Jan 2005, Tony Finch wrote:

> Actually, Exim's HELO name syntax checking is very lax and it's quite
> happy with bare IP addresses, double dots, etc. The check above is very
> effective and highly recommended.


A bare IP (v4) address IS a syntactically valid host name.

I understand we have 3Com to blame for this. If only a different
separator had been used for domain names...

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book:    http://www.uit.co.uk/exim-book