How do I config Sendmail to accept connects /only/ from localhost

marvin · 03-15-2001, 02:27 AM

I've tried grepping the docs on sendmail.org, tried grepping the howtos, and if I simply leave my system without a Mail Transfer Agent then I don't get the summary-of-integrity-tests e-mailed at root, so that seems daft.

If someone knows where I can find a doc/howto/faq that covers exactly this subject, I thank you in advance for giving that info, eh?

Cheers,
\m

Nova · 05-08-2001, 01:54 AM

Check /etc/sendmail.cf for the following entry

O DaemonPortOptions=Port=smtp,Addr=0.0.0.0, Name=MTA

And change to

O DaemonPortOptions=Port=smtp,Addr=127.0.0.1, Name=MTA

Changing the config to 127.0.0.1 will cause sendmail to only "listen" to port 25 on localhost loopback(127.0.0.1).

Cheers

ak47fred · 05-08-2001, 08:11 PM

On a similar subject, how does one tell sendmail to reject email from a particular domain?

jeremy · 05-09-2001, 07:26 AM

You would want to use the access.db feature of sendmail for this.

Quote:

FEATURE(`access_db')
The FEATURE macro can accept a second parameter giving the key file definition for the database; for example

FEATURE(`access_db', `hash /etc/mail/access')
Remember, since /etc/mail/access is a database, after creating the text file as described below, you must use makemap to create the database map. For example:

makemap hash /etc/mail/access < /etc/mail/access
The table itself uses e-mail addresses, domain names, and network numbers as keys. For example,

spammer@aol.com REJECT
cyberspammer.com REJECT
192.168.212 REJECT

would refuse mail from spammer@aol.com, any user from cyberspammer.com (or any host within the cyberspammer.com domain), and any host on the 192.168.212.* network.

ak47fred · 05-09-2001, 07:26 PM

Thanks