Exchange 2003 Sending through Postini Errors

Posted on 2009-05-01
Last Modified: 2013-11-30
Exchange 2003 on SBS 2003, I have three different clients using the postini service for thier inbound mail. I will get mail bounced back from my server with the folling message

 There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            < #5.5.0 smtp;550 Requested action not taken: mailbox unavailable or not local>
Sometimes they go through somtimes I get this error and a resend once or twice will eventually get the message through.

Any ideas?

Question by:kposko
    LVL 65

    Accepted Solution

    The error means what it says - the server the message was delivered to is unable to deliver the message.
    What it does NOT mean is that the message was delivered to the correct server. You need to look at your SMTP logs to see what server the message was delivered to at that time and confirm if it is being delivered to another server next time. Almost certainly it is a problem outside of your control, as the remote server is rejecting the message, but convincing someone of the problem is a different matter altogether.


    Author Closing Comment

    It is multiple servers so I'll keep watching my logs and then might be able to provide POSTINI with the server or servers giving me a problem...from what ive read here they will not be of much help in resolving this, but we'll see.

    Thanks for your help!

    Featured Post

    Why You Should Analyze Threat Actor TTPs

    After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

    Join & Write a Comment

    The most common mistakes I hear or read about email usually begin with people talking about POP3 and IMAP, so let's clear those off the table: POP3 and IMAP have absolutely nothing to do with sending or receiving email, so get that notion out of you…
    Hello Friends, My friends and relatives always ask me how to delete all the various types of emails at once in our g-mail  or windows live account.  So I researched this topic to find a unique solution to this query.  Here it is for those who do …
    Migrating to Microsoft Office 365 is becoming increasingly popular for organizations both large and small. If you have made the leap to Microsoft’s cloud platform, you know that you will need to create a corporate email signature for your Office 365…
    This video discusses moving either the default database or any database to a new volume.

    728 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    20 Experts available now in Live!

    Get 1:1 Help Now