How do I block a domain from the recieved portion of headers
Brandon Hoppe
bhoppe at ti.com
Wed Mar 22 21:00:17 GMT 2006
>Look at adding bogus HELO checking to sendmail. Download:
>
>http://www.cs.niu.edu/~rickert/cf/hack/block_bad_helo.m4
>
>Install the contents as /usr/share/sendmail-cf/hack/block_bad_helo.m4
>
>Then add the line below line to the top of your sendmail.mc file right after
>the line "include(`/usr/share/sendmail-cf/m4/cf.m4')dnl":
>
>Here is the line to add:
>
>include(`/usr/share/sendmail-cf/hack/block_bad_helo.m4')dnl:
>
>The rebuild your sendmail.cf file:
>
> m4 sendmail.mc > sendmail.cf
>
>Then restart MailScanner.
>
Ok, i've created the block_bad_helo.m4 file under
<install_path>/sendmail/cf/m4
Now, in my sendmail.mc file, I didn't have the include line of cf.m4.
I'm on sendmail 8.13.3 currently. This is my current sendmail.mc file:
divert(-1)
divert(0)dnl
VERSIONID(`$Id: generic-solaris.mc,v 8.13 2001/06/27 21:46:30 gshapiro
Exp $')
OSTYPE(solaris2)dnl
DOMAIN(generic)dnl
define(`confAUTH_OPTIONS', `A')dnl
define(`confAUTH_MECHANISMS',`LOGIN PLAIN')dnl
define(`SMART_HOST', `outgoing.verizon.net')
TRUST_AUTH_MECH(`LOGIN PLAIN')dnl
FEATURE(`virtusertable', `dbm /etc/mail/virtusertable')dnl
FEATURE(`authinfo', `dbm /etc/mail/authinfo')dnl
FEATURE(`masquerade_envelope')dnl
FEATURE(dnsbl)dnl
FEATURE(`dnsbl', `sbl.spamhaus.org', `Spam blocked see:
http://spamhaus.org/')dnl
FEATURE(`dnsbl', `bl.spamcop.net', `"Spam blocked see:
http://spamcop.net/bl.shtml?"$&{client_addr}')dnl
FEATURE(`dnsbl', `relays.ordb.org', `"550 Email rejected due to sending
server misconfiguration"')dnl
MAILER(local)dnl
MAILER(smtp)dnl
Now, I wasn't sure where to put it so I added these two lines after the
divert(-1) line:
include(`../m4/cf.m4')dnl
include(`../m4/block_bad_helo.m4')dnl
and restarted sendmail. When I send an email to my account, I get a
return message that says:
(reason: 554 5.3.5 Infinite loop in ruleset Local_check_rcpt, rule 2)
Am I placing the include of the m4 files incorrectly?
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