Re: [exim] syntactically invalid argument(s) - rejected HELO

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Author: Igor Robul
Date:  
To: exim-users
Subject: Re: [exim] syntactically invalid argument(s) - rejected HELO
Marc Perkel wrote:

>>
> Yes - I think that's it! So - why is an underscore a reason for
> rejection?
>
Becuse it is invalid character in hostname.
Hostname can contain only latin letters, digits, and "-" (minus).
But today many network administrators use '_' in hostname as replacement
for space.



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