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5.1.0 - Unknown address error 552-'Requested mail action aborted: exceeded storage allocation'

I am having trouble receiving email consistently. We have an SBS 2003 server at our office. We have a dynamic IP address so we use NO-IP to give us a static IP. Our MX record points to a static mail server owned by our hosting company. That mail server pushes all of the mail to our no-ip address. We have opened the ports on our firewall to allow our SBS to collect that mail and then deliver it through exchange. This setup is great because it allows us to use exchange but not have the stupid 15 minute delay if we use the POP3 exchange tool, or the issue of having all of our mail get flagged as SPAM because we are dynamic if we try and point our MX record to us. THE ISSUE is that it works MOST of the time. Every once in a while a user trying to email us gets this response:

The following message to <DBean@valleycomputerworks.com> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 552-'Requested mail action aborted: exceeded storage allocation'

There is almost no rhyme or reason as we are able to receive email from the same people sometimes but not other times and often if they retry right away or forward us the bounce back, it will work.

Any thoughts?
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valleycomputerworks
Asked:
valleycomputerworks
2 Solutions
 
SembeeCommented:
That can often be caused by there being a cluster of servers somewhere, and one of the cluster is faulty. If you route your email out through another server address that could be a cluster of servers that respond to the address. The same could apply at the recipient's end.

Not really a lot you can do about it unless you can pin down the IP address of the faulty server using SMTP logs.

Simon.

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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
"This setup is great because it allows us to use exchange but not have the stupid 15 minute delay if we use the POP3 exchange tool"

Actually, why don't you just configure your MX record to your NO-IP hostname?  ie, yourname.no-ip.com ?

That will send it directly to your SBS.  You can then modify the hostname that the Exchange Server identifies itself with in the Default SMTP Virtual Server properties > Delivery Tab > Advanced > Fully-qualified domain name.  Set this to yourname.no-ip.com and enter your yourdomain.com in the "Masquerade domain" field.

You can still use your hosted SMTP server for the outbound smarthost to avoid being on the blacklists due to having a dynamic IP.

Jeff
TechSoEasy
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valleycomputerworksAuthor Commented:
Our internet connection is not very reliable, nor is our server. Where our mail is pointed two has three different internet connections and a backup generator. That way if our server is down the mail will go somewhere until our server is back up.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
If your server goes down... it would have to be down for 72 hours before you lose any email.

Jeff
TechSoEasy
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Computer101Commented:
Forced accept.

Computer101
EE Admin
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