[Gllug] blacklisted mail servers

[Martin A. Brooks]

paul wrote:
> If a mail server is blacklisted by a company, but the people running the 
> server are not guilty of spamming - I.E: they have been used as a spamming 
> relay, does all mail get blocked or is it dependent upon who blacklists you?

Blacklists are third party databases of IP ranges that have been 
identified, right or wrongly, as being a source of spam.  Blacklists 
themselves do not block mail.

People who run mail servers may choose to check all connecting hosts 
against one or many blacklists before deciding whether to accept an email.

Some systems,  Antibody for one, merely use the blacklists as a guide. 
A message can be assigned extra "spam points" if it comes from a host 
that is part of a blacklist but still accept the mail if the total score 
it receives is less than the spam trigger threshold.


> Also is there a quick way to check the security settings (relay settings etc) 
> within sendmail?

less /etc/sendmail.cf ? :)

Mart.
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