Re: [Exim] Return code from EXPN

On Mon, 15 Jul 2002, Anjan Sen wrote:

> Hello,
>
> When Exim 4.05 refuses an EXPN, it returns a 550 code. Since 550 usually
> means something like 'mailbox not found', is 550 the most appropriate code?
> Sendmail, qmail and postfix all seem to return 502. Should Exim do the same?

Only the first digit of an SMTP response code should be interpreted by a
sender-SMTP when determining its actions - the remainder are for human
interpretation.