Problems with 'From:' field rewriting in relayed mail

[Slawek Zak <zaks@prioris.im.pw.edu.pl>]

Hi!
I've encoutered following problem with my latest zmailer configuration
(it't 2.99.50s11 on RedHat Linux with glibc2):
My host is collecting mail for a few addresses and users need to
specify the From: field for each mail message, and all host they send
their mail from are on the relaycustomer list.
My last installation (2.99.49p9 Debian libc5) accepted it, but the new one
always rewrites the hostname to the name of machine zmailer is
running on. My question is: Which function in zmailer's configuration
files (I guess this particular problem is caused by the router) is
responsible for this (strange) behaviour? 
				Thanks in advance for your help /S

-- 
* Suavek Zak
* email: zaks@im.pw.edu.pl   voice: +48 (0) 22 674 66 79
* PGP v2.3: 2048/9A7CBF71,   finger://zaks@prioris.im.pw.edu.pl

    The Nagas of Upper Burma say that the sun shines by day because,
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