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Client host rejected: Please do not SPAM, use your official mailgateway

Posted on 2004-04-27
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Last Modified: 2010-04-08
Get this message from one of my users who tried to e-mail some one

Client host rejected: Please do not SPAM, use your official mailgateway>

i have read post posts on the is subject about it being a reverse lookup problem.

But i dont know where to start

here is how every thing is set up

I have a mail server and a file server

Mail server on 196.168.0.3
file server on 196.168.0.5
Gateway on 196.168.0.52

Out side Leased line through firwall 142.142.142.142

The mail server is configured to @yourhere.com
This Email address is only used if the main mail server in Houston fails.(we are in the UK)
We all have mail boxes in Houston that are forwared to our mail server the address being @ouraddress.com
Houston mail server is configured to @ouraddress.com
We send by default smtp mail  on (our Uk server) from the address @ouraddress.com

did a nslookup

Default server points to file server with correct lan ip address

set type = ptr
Inputted Internet ip address 142.142.142.142
Got Non-authortive answer
11.11.11.11..in-addr.arpa     name =  no-dns-yet.co.uk

All the names and numbers have been made up

how do i set up my reverse look ups and where


Thanks in advance Mark
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Question by:ellandrd
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7 Comments
 
LVL 13

Expert Comment

by:Mob-bom
ID: 10929972
Reverse DNS is done on your PTR records.  Place the reverse entry in your A record of your zonefile: 1 PTR mail.yourhere.com

Whoever handles your dns records can do this for you.  Its a common request.  

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Author Comment

by:ellandrd
ID: 10936556
I have looked in DNS

ANd in the reverse lookup zones there is one folder called


192.168.1.x subnet all ptr records for all computers are there including the mail server or am i missing some thing
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Mob-bom earned 500 total points
ID: 10938968
the reverse dns needs to be on the ip that is sending the email, most likely the ip address after your firewall
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LVL 16

Author Comment

by:ellandrd
ID: 10939325
so from the example above 142.142.142.142 needs a ptr records
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Expert Comment

by:Mob-bom
ID: 10939361
most likely.  who handles your dns server(s)?  They should be able to do this for you easily.
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LVL 16

Author Comment

by:ellandrd
ID: 10939431
He is holiday for 2 weeks that why i ask
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Expert Comment

by:Mob-bom
ID: 10939478
:(  That is what needs to be done.  
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Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

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