Re: selecting MX record

Subject: Re: selecting MX record
From: Rafi Sadowsky (rafimeron.openu.ac.il)
Date: Tue Jan 04 2000 - 10:43:54 CST

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On Tue, 4 Jan 2000, Geoff Gibbs wrote:
>
> A colleague has just suggested that hamburg have a fire wall
> and that the "0" preference is behind it. If this is true, it appears
> that sendmail is working its' way through the preferences until it
> hits the mail server accessable from outside the firewall, when
> it gets the "520" reply, while Postfix is taking it as a hard failure
> and stopping.
where is error 520 defined ?

IMO a firewall should simply reset the TCP connection if it wants external
SMTP to fallback to the first "outside" MX

        Rafi
>
> All the best
>
> Geoff
>
> UK-Human Genome Mapping Project-Resource Centre,
> Hinxton, Cambridge, CB10 1SB, UK
> Tel: +44 1223 494530 Fax: +44 1223 494512 E-mail: G.Gibbshgmp.mrc.ac.uk
>
>
>

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