sorbs

[pch0317]

Hi List

I have problem with mail system. I can't send e-mail to internet.
I have been listed on dnsbl.sorbs.net.
What I can do to delisted from sorbs? Should I only use this link
http://www.au.sorbs.net/cgi-bin/support and everything will be ok?
Anyone have this problem?

Why I have been listed on dnsbl.sorbs.net? Only, because I haven't DNS
PTR record for my domain? Should I write this PTR to DNS?

pch0317


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[Boyd Stephen Smith Jr.-3]

In <4A565205.3070702@...>, pch0317 wrote:
>I have problem with mail system. I can't send e-mail to internet.
>I have been listed on dnsbl.sorbs.net.
>What I can do to delisted from sorbs?

Ask SORBS; Debian has nothing to do with SORBS.

>Should I only use this link
>http://www.au.sorbs.net/cgi-bin/support and everything will be ok?

Ask SORBS; Debian has nothing to do with SORBS.

>Anyone have this problem?

I do not.  I have been careful to only send mail for myself and to not send
SPAM.

>Why I have been listed on dnsbl.sorbs.net?

Ask SORBS; Debian has nothing to do with SORBS.

>Only, because I haven't DNS
>PTR record for my domain?

Ask SORBS; Debian has nothing to do with SORBS.

I would assume not though.  Checking to see if a PTR record exists is
probably faster than checking a DNSBL, so I wouldn't think any DNSBL would
be based on that.

>Should I write this PTR to DNS?

All IP addresses, especially those used for servers, should have a PTR
record, but very few things depend on that.

If you do have a PTR record, then it should be consistent.  That is, if you
start with an IPv4 address and then do IPv4 address -> PTR lookup -> domain
name -> A lookup -> IPv4 address(es), the resulting list should contain the
address you started with.  Same thing if you do IPv6 address -> PTR lookup -
> domain name -> AAAA lookup -> IPv6 address(es).  If it is inconsistent,
you might be grey- or black-listed by certain mail servers.
--
Boyd Stephen Smith Jr.           ,= ,-_-. =.
bss@...             ((_/)o o(\_))
ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-'
http://iguanasuicide.net/            \_/

[kj-12]

pch0317 wrote:
> What I can do to delisted from sorbs? Should I only use this link
> http://www.au.sorbs.net/cgi-bin/support and everything will be ok?
You could do whatever they ask and then pray they actually de-list you.
   It's not a guarantee though.  Which sites are blocking you based on
SORBS?

First try to figure out why you got listed.  Did you have a website
compromise?  Contact form spam? SMTP auth password guessed?  Does your
server bounce mail to external addresses?

> Anyone have this problem?
Had.  Ended up having to get a new IP because despite paying their
ransom, they never de-listed us.

> Why I have been listed on dnsbl.sorbs.net?
Most reputable dns blacklists use a combination of spam traps and common
sense.  SORBS can be quite trigger happy.

> Only, because I haven't DNS
> PTR record for my domain? Should I write this PTR to DNS?

Your DNS setup won't get you listed on a dnsbl, but it might cause mail
providers to reject mail from you.   You need to have a DNS A record
that matches the hostname your MTA uses in SMTP conversation.  telnet to
your mail server on port 25 to find out.  The hostname should be a fully
qualified domain name.  The A record should point to the server's
primary IP (or which ever IP the server uses to send mail, if it's set
different).  In addition to that, said IP should have a PTR record that
matches the hostname.


Good luck.

--kj


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