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There was a SMTP communication problem with the recipient's email server #5.5.0 smtp;553 company.local does not exist

Posted on 2006-06-26
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Last Modified: 2011-08-18
I have added 2 new users to our SBS2003 Std server.  All users email on behalf of our company mail account.  mail@company.com.au.

The problem is the 2 new users are coming back with the following error.

me@bigpond.com on 27/06/2006 8:24 AM
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <mail.company.com.au #5.5.0 smtp;553 company.local does not exist>

I have compared the new account to old accounts and can not see any difference.  All users have send on behalf of permissions for the mail@company.com.au account.

They also have full access rights to the mail@company.com.au user account to check incoming emails, contacts, etc.

The user accounts have their reply email addresses as user@company.local (have deleted their user@company.com.au) so they do not have an external mail address.

They can send on behalf of the mail@company.com.au account to an internal email address with no issues and from their own account to internal email addresses.
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Question by:Jasonm71
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Expert Comment

by:mvvinod
ID: 16989265
Your 2 new users only have .local e-mail address. When a user sends on behalf of another user, the source e-mail address is the e-mail address of a user. In your case this is a .local address which cannot be reached back.

Ask one of the 2 users to send an e-mail to an external account (yahoo,gmail,etc..)

Check the from address. If it says user@company.local obviously replying to that will go nowhere...

Instead the way your users should send mail through your main account is:
1. They should be granted "send as" right on main account mailbox
2. They should type the mail@company.com.au in the from field of every e-mails that go out..

Since they are using this as source address, it will be reachable back. And since you gave "send as" right, they would be able to do this..

Vinod.
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Author Comment

by:Jasonm71
ID: 16989303
OK I have further looked into it.  The users that work when they send an email actually send it from the mail@company.com.au account  The 2 new users who do not work are sent on behalf of mail@company.com.au.  Maybe it is an outlook issue.

To do this I got internal users to send my user account emails on behalf of the mail@company.com.au account.
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Accepted Solution

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mvvinod earned 2000 total points
ID: 16989335
You have to grant the 2 new user "Send as" permission and not "Send on behalf of" permission.

Both are different.

Vinod.
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