This document discusses causes and solutions for the Exchange Error 550. Some common causes include connectivity issues, inconsistent databases, hardware/software problems, missing log files, and virus infections. Suggested solutions include checking database consistency and repairing with Eseutil, setting up telnet connections to mail servers, ensuring proper PTR records, dismounting and remounting databases, and using third party tools to recover data from corrupted Exchange databases.

1. Exchange Error 550

2. Cause of Error
• Connectivity issues between External Domain
& Domain server
• Database is in inconsistent state & can’t start
• System Hardware/Software problem
• Log file missing
• Virus infection

3. Exchange error 550
• There was a SMTP communication problem with the
recipient's email server. Please contact your system
administrator. <jomc.co.uk #5.5.0 smtp;550 must be
authenticated>
• SMTP 550 5.7.1 Unable to relay error
• SMTP error of " mailserverXXX.edu #550 5.7.1 Undeliverable
message;
• Operation terminated with error -550
&lt;JET_errDatabaseInconsistent, Database is in inconsistent
state>

4. Try These Techniques

5. First Solution
• If due to any reason the system running Exchange Server is
not working properly or improperly shut down, the under
such circumstances, error message like that mentioned
below can be count
• Check the state of the database
• Use Eseutil.exe with the "MH" option on the problem
database, and dump the output to a text file.
• Edit the Edbdump.txt file and confirm that the state of the
database is inconsistent.
• If the database is inconsistent, run the EDBUTIL /R /DS.

6. Eseutil/MH

7. Technique Second
when you get back emails form one particular
domain server
• Setup a telnet connection to the mail-server of
that specific domain.
• Send a message via telnet to the mail server.
• Create a PTR record with the help of your ISP.
• Then check issue for only one domain or multiple
domains and at last.
• And at last try to telnet on that email server and
send EHLO command

8. Third Solution
Try in all case of Exchange error 550
• Start Exchange system manager
• Right click on the database that you want to
dismount.
• Click task and then click dismount store

9. If you still don't get back your data

10. Apply This Tool

11. Perfect Mailbox Conversion
• Recover lost, deleted Exchange database
• Retrieve data from encrypted EDBs
• Repair Corrupt EDB files
• Recover emails with Attachment
• Video, PPT, Audio clips successfully recovered
• Recover whole Exchange server create
mailboxes (5.0 above)

12. Other Benefits
• Trusted Application
• Free Trial Facility
• 24x7 Chat support
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13. Useful Links
• http://123dl.org/dl.php?id=62
• http://www.edbconverter.org/purchase.html

14. Thank You