Message-ID: <20001203130319.30842.qmail@web10603.mail.yahoo.com> Date: Sun, 3 Dec 2000 05:03:19 -0800 (PST) From: Ashok P <asharien78@yahoo.com> Subject: Help Regarding qmail-smtpd hi, i'm running qmail-smtpd, when somebody connects to port 25 and issues the following commands helo 220 server.com mail from: <abc@something.com> #i get a response saying 250 ok <p> this is dangerous as people could assume false identities and send mails. is there any way by which qmail can prevent this from happening like doing a reverse dns lookup or so. <p> Any info on this issue would be very helpful. Expecting your reply and thanks for the help in advance <p><p>Rgds, ashok __________________________________________________ Do You Yahoo!? Yahoo! Shopping - Thousands of Stores. Millions of Products. http://shopping.yahoo.com/
Message-Id: <5.0.2.1.0.20001203160344.00a0bc60@sol.ece.usu.edu> Date: Sun, 03 Dec 2000 16:04:00 -0700 From: Irwan Hadi <irwanhadi@iname.com> Subject: Re: [SLE] Help Regarding qmail-smtpd At 05:03 AM 12/3/00 -0800, Ashok P wrote:
hi,
i'm running qmail-smtpd, when somebody connects to port 25 and issues the following commands
helo 220 server.com mail from: <abc@something.com> #i get a response saying 250 ok
this is dangerous as people could assume false identities and send mails. is there any way by which qmail can prevent this from happening like doing a reverse dns lookup or so.
from www.qmail.org/top.html Nagy Balazs wrote a patch to ensure that the domain name on the envelope sender is a valid DNS name (local copy by request of author). This ensures that you do not receive email which you cannot bounce, should that prove necessary. http://www.qmail.org/qmail-1.03-mfcheck.3.patch
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