Email Problem

my company email server can send emails to hotmail, aol, google, and yahoo. It can't send to optonline.net, nyc, rr.com, and aol.com. I can receive the emails. I tried looking through all the blacklists but came out clean. I am at the point i don't know where to turn. please any advice would help
DellStatorAsked:
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CPetrich12Commented:
You may need to call your ISP and ensure that there is a reverse lookup record for your domain. Many companies have security enabled on their mail severs that if the originating IP address of the email does not match the domain, the email is automatically marked as spam.  This can be as simple as mistyping your domain name when pointer record was created.  An easy way to check to see if your IP matches you domain is to do a reverse lookup from a computer outside of your network as your reverse DNS will look to your internal DNS servers first and will always be correct.  The command is
"nslookup xxx.xxx.xxx.xxx" where the X's represent your public IP address.

DNS:                  yourdomain.com  10.10.10.25
Reverse DNS:   10.10.10.25   yordomain.com
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CPetrich12Commented:
The has happened to my clients before. All it takes is a simple call and about 48 horus for the new record to propogate. I hope this helps.
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
Do you have a PTR record setup?   When you send are you sending from the advertised MX record.    
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DellStatorAuthor Commented:
i have a reverse pointer created for it. which was done last week.
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rogermellieCommented:
Some organisations block any email coming from dynamic IP ranges.  If your email server's public IP is not static or erroneously listed as dynamic this is likely to be the cause.  The list of all ISP's dynamic ranges is the Spamhaus PBL or policy block list.

As you are a legitimate SMTP sender you can remove your IP from the PBL database here;

http://www.spamhaus.org/pbl/

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DellStatorAuthor Commented:
already done contacted all isps all i have been doing for almost a week now..  any ideas on who to talk to as far as optonline.net? already tried busienss tech support they said they can't do anything
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DellStatorAuthor Commented:
i have a static ip address not dynamic.
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DellStatorAuthor Commented:
Generating server: XXXXX.XX.com
#550 4.4.7 QUEUE.Expired; message expired ##

sgmtmi@optonline.net

Original message headers:

Received: from XXXXX.XX.com ([fe80::200c:8112:dcf2:e010]) by XXXXXX.XX.com
([fe80::200c:8112:dcf2:e010%10]) with mapi; Tue, 23 Mar 2010 13:16:40 -0400
From: XXXXX XXXXXX
To: "XXXXXXXXXXXXXXXX (XXXXXXX@optonline.net)"

Date: Tue, 23 Mar 2010 13:16:38 -0400
Subject:
Thread-Index: AcrKrJkXMu/YNzuiTwyU2eGte4TIjg==
Message-ID: <6F996E8F1638EE49A1392A3F911CC707A3895EEA@XXXXXX.XX.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
acceptlanguage: en-US
Content-Type: multipart/alternative;
boundary="_000_6F996E8F1638EE49A1392A3F911CC707A3895EEAXXEXXXXXcom_"
MIME-Version: 1.0
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shauncroucherCommented:
Can't do much without your domain name but it does sound like reverse DNS to me.

Are you sure of the IP address you are using to send mail, and does the EHLO FQDN match the rDNS?

See my article I published regarding DNS data: http://exchangeshell.wordpress.com/2010/03/12/exchange-send-connector-ehlo-and-dns-data-rdns-ptr-mx-spf-txt-a-record

Shaun
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DellStatorAuthor Commented:
goshow.com
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shauncroucherCommented:
Your MX record has priority 0 for one of the 'A' records - this can cause issues with inbound mail, change this to at least 1 or higher.

If you are using ga-e2k7.goshow.com to send mail, this refers to an IP address that has a valid PTR (rDNS) record.

shaun
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shauncroucherCommented:
Just make sure your Exchange send connector also use ga-e2k7.goshow.com as the FQDN for sending mail.

Shaun
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DellStatorAuthor Commented:
well ga-e2k7.goshow.com is a valid rdns that is what we use to send and receive email from the other one is backup email account.
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shauncroucherCommented:
As long as your mail definitely gets sent from 69.38.xxx.50 then everything is in order.

you should check with the entities you cannot send to and ask them to remove you from any lists they may use. I know you can subsribe to aol.com to be removed from their internally managed blacklist.

Shaun
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DellStatorAuthor Commented:
well the thing is that we are clear from any lists possible. I check all the major lists.
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shauncroucherCommented:
I'm not talking about the 'major' lists, I'm talking about those that are blocking you. Ask them if you remain on any lists that they might maintain.

As for as rDNS and commonly used blacklists you are clean.

Shaun
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