search for: anti_spam

Hi all, I've been trying to hit on the right configuration combo to allow relaying from specific users and/or domains to an internal box running Sendmail. Reading the docs at http://www.sendmail.org/m4/anti_spam.html#relay and http://www.sendmail.org/m4/anti_spam.html#access_db_fine I would appear that I should be able to all per-address relaying in /etc/mail/access by enabling FEATURE(`relay_mail_from')dnl in sendmail.mc and restarting Sendmail. Then adding test at testdomain.com to /etc/access as:...

I just got through updating my /etc/mail/access file, adding about 20 more IP's that are sending spam/junk mail. During the process, I noticed I had some partial IP's in there, like 64.12.233 which is what I wanted to block. The IP did NOT however get blocked. From what I see, as long as I have a full ip address, they are blocked, but the partial (16) is not. Should it not work anyhow?

At ~07:40 (UTC-4:00) this morning our gateway host lost its WAN Ethernet adaptor. Subsequent to recovery, which required a reboot, the following entries were find in /var/log/messages: Jun 6 07:39:50 gway02 kernel: PING_FLOOD: IN=eth0 OUT= MAC=00:25:90:61:74:c0:00 :24:14:2b:f2:80:08:00 SRC=74.205.112.125 DST=216.185.71.33 LEN=64 TOS=0x00 PREC= 0x00 TTL=50 ID=30954 PROTO=ICMP TYPE=8 CODE=0

I am looking for a way for sendmail to ALLOW auth by IP and not user name (its a closed network) or even SKIP invalid auth ? Is that even possible ? Jerry

...for a way for sendmail to ALLOW auth by IP and not user name > (its a closed network) or even SKIP invalid auth ? > Is that even possible ? It is possible to configure Sendmail to relay based on client connection. The doc will tell you how. https://www.sendmail.org/~ca/email/doc8.12/cf/m4/anti_spam.html#access_db If your Sendmail setup demands AUTH, then it will not skip in case of false credentials. Whatever backend you configure cyrus-sasl to use for validating the SMTP AUTH credentials, it is possible to use other values than a user name. > Jerry Alexander