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03.07.2007 at 01:11PM PST, ID: 22434843
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553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

Tags: domain, list, allowed, my, 553
I am getting the 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) error when trying to send out to certain recipients. Everything was working fine until we changed the public IP address for the server since we switched ISPs.

I have reviewed other entries and I cannot find anything applicable to what we are experiencing.

- Exchange 2003 with latest SP and patches running on Windows 2003

Here is the error:

 -----Original Message-----
From:       System Administrator  
Sent:      Sunday, March 04, 2007 8:42 PM
To:      Dave Breit
Subject:      Undeliverable: audio stream code

Your message did not reach some or all of the intended recipients.

      Subject:      audio stream code
      Sent:      3/4/2007 8:42 PM

The following recipient(s) could not be reached:

      Dave Breit on 3/4/2007 8:42 PM
            553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

The ISP has the correct reverse DNS information and we are resolving via DNS and not Smart Host.

Any help would be appreciated.
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Question Stats
Zone: OS
Question Asked By: woolieb
Solution Provided By: Sembee
Participating Experts: 1
Solution Grade: A
Views: 324
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03.07.2007 at 02:26PM PST, ID: 18674678

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03.09.2007 at 11:49AM PST, ID: 18689910

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03.09.2007 at 04:44PM PST, ID: 18691851

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03.12.2007 at 06:30AM PDT, ID: 18701707

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03.12.2007 at 07:34AM PDT, ID: 18702274

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03.12.2007 at 08:00AM PDT, ID: 18702479

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03.07.2007 at 02:26PM PST, ID: 18674678

Rank: Savant

Put your domain name in to dnsreport.com and see whether it flags any errors.

Simon.
 
03.09.2007 at 11:49AM PST, ID: 18689910
Yes. Here is what it returned. Please let m know what needs to be done to rectify it. Also, on the name servers they are referencing an ISP I don't use anymore. Should my current ISP provide me with information to replace this?

Open DNS Servers

ERROR: One or more of your nameservers reports that it is an open DNS server. This usually means that anyone in the world can query it for domains it is not authoritative for (it is possible that the DNS server advertises that it does recursive lookups when it does not, but that shouldn't happen). This can cause an excessive load on your DNS server. Also, it is strongly discouraged to have a DNS server be both authoritative for your domain and be recursive (even if it is not open), due to the potential for cache poisoning (with no recursion, there is no cache, and it is impossible to poison it). Also, the bad guys could use your DNS server as part of an attack, by forging their IP address. Problem record(s) are:

Server 207.103.0.14 reports that it will do recursive lookups. [test] Server 207.103.11.9 reports that it will do recursive lookups. [test] See this page for info on closing open DNS servers.

Missing (stealth) nameservers

FAIL: You have one or more missing (stealth) nameservers. The following nameserver(s) are listed (at your nameservers) as nameservers for your domain, but are not listed at the parent nameservers (therefore, they may or may not get used, depending on whether your DNS servers return them in the authority section for other requests, per RFC2181 5.4.1). You need to make sure that these stealth nameservers are working; if they are not responding, you may have serious problems! The DNS Report will not query these servers, so you need to be very careful that they are working properly.

ns3.voicenet.com.
ns4.voicenet.com.
This is listed as an ERROR because there are some cases where nasty problems can occur (if the TTLs vary from the NS records at the root servers and the NS records point to your own domain, for example).

Stealth NS record leakage

Your DNS servers leak stealth information in non-NS requests:

Stealth nameservers are leaked [ns3.voicenet.com.]!
Stealth nameservers are leaked [ns4.voicenet.com.]!

This can cause some serious problems (especially if there is a TTL discrepancy). If you must have stealth NS records (NS records listed at the authoritative DNS servers, but not the parent DNS servers), you should make sure that your DNS server does not leak the stealth NS records in response to other queries.

 
03.09.2007 at 04:44PM PST, ID: 18691851

Rank: Savant

That is DNS errors. That will have nothing to do with the problem.
Did you get any errors in the mail server section?

You don't have to use the name servers of your existing ISP. If your previous ISP is responsible for the domain then it will continue to work.
What you might want to consider is transferring the domain to a dedicate domain name registrar - GoDaddy, register.com etc.

Simon.
 
03.12.2007 at 06:30AM PDT, ID: 18701707
Here are the errors in the Mail section:

WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.

monmouth.voyantinc.com claims to be invalid hostname
'*l7********************************ESMTP':
   220 *l7********************************ESMTP

(Voyant is the spam filtering service we use at all sites)

ERROR: One or more of your mailservers does not accept mail to postmaster@timesonline.com. Mailservers are required (RFC822 6.3, RFC1123 5.2.7, and RFC2821 4.5.1) to accept mail to postmaster.

monmouth.voyantinc.com's postmaster response:
>>> RCPT TO:<postmaster@timesonline.com>
<<< 554 5.7.1 <postmaster@timesonline.com>: Recipient address rejected: User not registered with ContentCatcher

WARNING: One or more of your mailservers does not accept mail to abuse@timesonline.com. Mailservers are expected by RFC2142 to accept mail to abuse.

monmouth.voyantinc.com's abuse response:
>>> RCPT TO:<abuse@timesonline.com>
<<< 554 5.7.1 <abuse@timesonline.com>: Recipient address rejected: User not registered with ContentCatcher

Your domain does not have an SPF record. This means that spammers can easily send out E-mail that looks like it came from your domain, which can make your domain look bad (if the recipient thinks you really sent it), and can cost you money (when people complain to you, rather than the spammer). You may want to add an SPF record ASAP, as 01 Oct 2004 was the target date for domains to have SPF records in place (Hotmail, for example, started checking SPF records on 01 Oct 2004).

These are all of the warnings and errors in the Mail section of the DNS test.


 
03.12.2007 at 07:34AM PDT, ID: 18702274

Rank: Savant

Do you send your email through the antispam service provider?

If not, then the dnsreport will not show anything of any use, as it uses public DNS information for your domain to query.

You will need to look at what IP address your server goes out as, then use the tools at dnsstuff.com to see whether that IP address has a reverse DNS entry.
For checking the IP address I tend to use http://checkip.dyndns.org/ on the server itself.

Another option would be to simply send all outbound email via the antispam provider.

Simon.
Accepted Solution
 
03.12.2007 at 08:00AM PDT, ID: 18702479
Good stuff. I ran the URL and it came up with a different IP address then the external one given to me by the ISP. I am having a rDNS record added for this address and will let you know how it goes.
 
 
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