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7.8

Can't Solve Relay Access Denied Issues

Asked by gloafman in Simple Mail Transfer Protocol (SMTP), SendMail Email Server, Domain Name Service (DNS)

Tags: Microsoft, Exchange, 2003, was a SMTP communication problem with the recipient's email server #5.5.0 smtp;554 Relay access denied

I'm sorry to beat this issue any further, but i have had no luck on all my searches for a solution. I have a 2003 Server with Exchange 2003. I have various clients who are using RPC over HTTP and it has been very successful. In fact, 95% of the emails go through properly. At least every day however, one of my clients forwards me a message with an NDR. Sometimes it's the same, sometimes it is different. Here's what we might receive:

#5.5.0 smtp;553 sorry, mail to that recipient is not accepted (#5.7.1)>
smtp;554: Relay access denied
#5.7.1 smtp;550 5.7.1 Unable to relay for ...
;553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)>
5.5.0 smtp;550 No such user - psmtp
18591 is currently not permitted to

Now, i've tried many of the things that are suggested out there, with turning off/on SMTP Auth, i've verified that the reverse DNS is to my correct server address. I have a Barracuda firewall scanning incoming email, which i have removed and still get the messages. I've even gotten messages bounced back saying "no such user" when we are sure that there is a user at the destination address.

I get a 'relay access denied' when i, myself send a message to a particular domain. If i re-send the email two seconds later, the reciipient gets it.

I'm sorry to be so vague in my descriptions, but i' can't seem for the life of me to solve this problem once and for all! Any advice would be appreciated.
[+][-]11/16/08 04:21 PM, ID: 22972517Expert Comment

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[+][-]11/17/08 10:17 AM, ID: 22977861Expert Comment

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[+][-]11/17/08 01:43 PM, ID: 22979781Expert Comment

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[+][-]08/18/09 07:24 AM, ID: 25123566Author Comment

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[+][-]08/18/09 09:24 AM, ID: 25124914Expert Comment

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[+][-]08/25/09 08:50 AM, ID: 25178853Accepted Solution

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About this solution

Zones: Simple Mail Transfer Protocol (SMTP), SendMail Email Server, Domain Name Service (DNS)
Tags: Microsoft, Exchange, 2003, was a SMTP communication problem with the recipient's email server #5.5.0 smtp;554 Relay access denied
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Solution Provided By: gloafman
Participating Experts: 3
Solution Grade: A
 
 
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