Date: Tue, 22 Jan 2002 09:47:27 -0800 From: "Lawrence Sica" <lomifeh@hotmail.com> To: "Roger 'Rocky' Vetterberg" <listsub@rambo.simx.org>, "Bart Matthaei" <bart@dreamflow.nl> Cc: "Asep Ruspeni" <asepruspeni@yahoo.com>, <freebsd-security@FreeBSD.ORG> Subject: Re: relaying mail from DHCP clients Message-ID: <OE58yd3Dp8RoMUVHOqM0001a1b9@hotmail.com> References: <000101c19d18$57401d00$40c801ca@warhawk> <000801c1a31b$afe43e60$2e020a0a@mti.itb.ac.id> <20020122091048.K58243@heresy.dreamflow.nl> <3C4D2021.80006@rambo.simx.org>
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----- Original Message ----- From: "Roger 'Rocky' Vetterberg" <listsub@rambo.simx.org> To: "Bart Matthaei" <bart@dreamflow.nl> Cc: "Asep Ruspeni" <asepruspeni@yahoo.com>; <freebsd-security@FreeBSD.ORG> Sent: Tuesday, January 22, 2002 12:17 AM Subject: Re: relaying mail from DHCP clients > > > Bart Matthaei wrote: > > >On Tue, Jan 22, 2002 at 03:06:12PM +0700, Asep Ruspeni wrote: > > > >>my configurations : > >> > >>FreeBSD : mail server using sendmail > >>Windows2000 : DHCP server > >> > >>need help : > >>-my clients (which obtain IP from DHCP server) could'nt send mail using MUA > >>outlook express. > >>the comment was : > >>relaying denied, IP lookup failed [IP generated by DHCP server] > >> > >>question : > >>how do i setup my sendmail configuration so my clients could send mail from > >>his/her MUA using smtp service in my freebsd box. > >> > >>thank you in advance. > >>asep. > >> > > > >First of all, I think this is a bit off-topic. But ill try to answer > >anyway. > > > >After 2 min. of googling: > > > >FEATURE(accept_unresolvable_domains). > > > >Normally, sendmail will refuse to accept mail that has a return adress > >with a domain that cannot be resolved using the regular host lookups. > >(a technique commonly used by spammers). > >This feature permits acceptance of such addresses. > >Unresolvable domains can be selectively accepted using the access > >database. > > This won't help for ip's. All that does is turn of sendmail's reverse lookup feature. He needs to enable relaying not accepting mail for users... This is a dangerous feature as it is, too bad too many mail servers dont have a reverse dns ip address. --Larry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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