I have been receiving a lot of mail that I do not want from a single
source. I cannot reject it based on IP address or domain because I also receive a lot of mail that I do want from the same mail servers. I have configured my sendmail.mc file to reject the mail based on the Subject
line because the Subject line is always the same.
Unfortunately I do not understand the inner workings of sendmail enough
to know if it is fully accepting the email and then scanning and
rejecting it, or if it is still in the process of accepting the email
when it is rejected. In the former case I would expect it would be generating back scatter while in the latter I suspect it would not. Can
a more knowledgeable person enlighten me? I do not want to generate backscatter. Thanks
On Fri, 26 Mar 2021 01:15:30 +0000, NotReal scribed:
I have been receiving a lot of mail that I do not want from a single source. I cannot reject it based on IP address or domain because I
also receive a lot of mail that I do want from the same mail
servers. I have configured my sendmail.mc file to reject the mail
based on the Subject line because the Subject line is always the
same.
Unfortunately I do not understand the inner workings of sendmail
enough to know if it is fully accepting the email and then scanning
and rejecting it, or if it is still in the process of accepting the
email when it is rejected. In the former case I would expect it
would be generating back scatter while in the latter I suspect it
would not. Can a more knowledgeable person enlighten me? I do not
want to generate backscatter. Thanks
AFAIK, sendmail doesn't do this.
You need some post processor, so my 2c would be to filter it in your
mail reader.
The question is when is the rejection taking place in acceptance
process and is it creating backscatter.
NotReal wrote:
The question is when is the rejection taking place in acceptance
process and is it creating backscatter.
Failed header checks create an error in response to the final dot
of the message (that's the only stage in the protocol where it can
be done), hence no backscatter.
I have been receiving a lot of mail that I do not want from a single
source. I cannot reject it based on IP address or domain because I
also receive a lot of mail that I do want from the same mail servers.
I have configured my sendmail.mc file to reject the mail based on the
Subject line because the Subject line is always the same.
Unfortunately I do not understand the inner workings of sendmail enough
to know if it is fully accepting the email and then scanning and
rejecting it, or if it is still in the process of accepting the email
when it is rejected. In the former case I would expect it would be generating back scatter while in the latter I suspect it would not.
Can a more knowledgeable person enlighten me? I do not want to
generate backscatter. Thanks
I have been receiving a lot of mail that I do not want from a singleIf you need to reject emails based on the subject - milterregex is pretty good
source. I cannot reject it based on IP address or domain because I
also receive a lot of mail that I do want from the same mail servers.
I have configured my sendmail.mc file to reject the mail based on the Subject line because the Subject line is always the same.
Unfortunately I do not understand the inner workings of sendmail enough
to know if it is fully accepting the email and then scanning and
rejecting it, or if it is still in the process of accepting the email
when it is rejected. In the former case I would expect it would be generating back scatter while in the latter I suspect it would not.
Can a more knowledgeable person enlighten me? I do not want to
generate backscatter. Thanks
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