Re: How do you stop others from sending emails from your email addresses ?

[ha...@t-online.de]

Hi,

if you implement some whitelisting too, you could slightly change qmail to require
authentication if the sender pretends to be from your domain.
This will only affect the envelope from, however spammers that believe it is easier to bypass filters
with the local domain usually put it into the envelope anyway

Wolfgang Hamann

>> 
>> > Wednesday, July 25, 2007, 1:46:56 PM, you wrote:
>> > > I constantly, (about 15-20 times a day), receive s**m
>> > > emails from other people, but addressed from my email
>> > > address.  Is there any way of using SA to help on this
>> > > in any way at all please ?
>> > 
>> > > I want to stop myself from receiving them, but even
>> > > more importantly, how do I stop someone from sending
>> > > from my email address - can it be done please ?
>> 
>> On 26.07.07 15:21, Peter Mikeska (MiKi) wrote:
>> > Hi,you can solve it on MTA level or in SA level.
>> > you dont say what kind of MTA you are using, for example in qmail its
>> > simple, just use "badmailfrom" where you can put wildcard for whole
>> > domain eg: @mydomain.com - in case noone is sending mail outside your
>> > domain.
>> 
>> The badmailfrom will only affect his server. so if he put any domain into
>> badmailfrom, he won't be able to send/receive mail with that domain in mail
>> from: envelope, which would keep him off using his domain for mail.
>> 
>> That would not affect other servers, so any abuser could send any mail to
>> any server in the internet using this domain in mail from: and all the
>> e-mail would return back to him. So he would still get all those notices.
>>