Re: [Exim] sender_verify what's-going-on

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Author: Dave C.
Date:  
To: Tamas TEVESZ
CC: exim-users
Subject: Re: [Exim] sender_verify what's-going-on
On Fri, 8 Mar 2002, Tamas TEVESZ wrote:

>
> hi,
>
> strange thing i can't really get straight:
>
> relevant config snippet:
>
>     sender_verify = true
>     sender_verify_hosts_callback = *
>     sender_verify_callback_domains = ^yahoo\.c
>     sender_verify_callback_timeout = 60s

>
> exim.spec says:
>
> sender_verify_callback_domainsType: domain list       Default: unset

>
> When a sender address is being verified, an SMTP 'callback' to one
> of the hosts that handle mail for its domain occurs if the sender's
> domain matches "sender_verify_callback_domains" and the sending host
> matches "sender_verify_hosts_callback" (in addition to
> "sender_verify_hosts"). See section 45.3 for details.
>
> my reading of the above is that if the sender address domain part
> matches to the regexp "^yahoo\.c" then, regardless from what host the
> connection was initiated, it will be verified, but only then (ie. as i
> understand it's not supposed to verify any other sender addresses)


It will verify them, but will only use a callback for ones that match
callback domains.



>
> if the above reading is right, why am i getting this:
>
>
> SMTP<< mail from:<XXXXX.XXXXX@???>
> XXXXX.XXXXX@??? in sender_reject? no (end of list)
> XXXXX.XXXXX@??? in sender_reject_recipients? no (option unset)
> host in sender_verify_hosts? yes (*)
> verifying sender XXXXX.XXXXX@???
> >>>>>>>>>>>>>>>>>>>>>>>>
> Verifying XXXXX.XXXXX@???
>
> and then it goes through the verification process. XXXXXX.avon.com
> does not actually exist as such, so avon.com's smtp is broken as hell,
> but that's another matter. so, the message is then rejected.
>
> but why ? XXX.avon.com doesn't look like ^yahoo\.c to me ;0 am i
> misinterpreting the sender_verify_callback_domains doc ?


Yes, exim still verifies the sender, just not using a callback. (Eg, it
just checks for MX records/etc...

>
> that's exim 3.33
>
> thanks,
>
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>
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