dnsbl not working with sendmail (Ubuntu Precise 12.04)

[danielsender]

Hi,

Facing an incredible blitz from spammers I decided to add the dnsbl feature in sendmail.mc (debproto.mc,v 8.14.4) as:

FEATURE(`dnsbl',`sbl-xbl.spamhaus.org')dnl

after compiling I see that it appears in sendmail.cf

# DNS based IP address spam list sbl-xbl.spamhaus.org
R$* $: $&{client_addr}
R$-.$-.$-.$- $: <?> $(dnsbl $4.$3.$2.$1.sbl-xbl.spamhaus.org. $: OK $)
R<?>OK $: OKSOFAR
R<?>$+<TMP> $: TMPOK
R<?>$+ $#error $@ 5.7.1 $: "550 Rejected: " $&{client_addr} " listed at sbl-xbl.spamhaus.org

and related in other lines. However, after restarting sendmail, when I ran the test I get an email response saying:

Uh-oh, your SBL block is not working!

I wonder if someone can help me to fix this.

Thanks,

Daniel

 

[danielsender]

Anybody there?

 

[danielsender]

I wonder if there is another sendmail forum with higher activity than this one.