ATT00004.bin Attachments

Posted on 2014-07-14
Last Modified: 2015-05-11
We have users sending/forwarding e-mails to internal employees and an "att00004.bin" file attaches to the e-mail being sent.  The problem is we are not allowing .bin files to pass through our mail server.

Has anyone seen this issue?  Any help would be appreciated.
Question by:scorpio66
    LVL 11

    Expert Comment

    by:Forrest Burris
    (Assuming you guys are using Exchange)

    This is most likely reminiscent of the old winmail.dat attachments of earlier Exchange. Meaning, a rich text issue. You can force HTML to all users by doing the following.

    Organization Configuration > Hub Transport > Remote Domains > right click the object Default > click on Properties > select 'Never use' under Exchange rich-text format

    Author Comment

    Yes, we are using Exchange 2007.

    I have it configured as you have explained but to no avail.  I also had the user changed the mail format in Outlook from HTML to Rich Text and vice versa but no still no luck.
    LVL 11

    Accepted Solution

    Possibility the attachment was presented in the email BEFORE the text? IE: Someone pasted in a graphic and then followed it up with the description. Text needs to be in the message body before the attachment.

    Supposedly this, "The Exchange server insists that message text must always be first and attachments must always be last. As soon as the Exchange software sees one attachment in a message, it stops looking for text, and treats anything else in that message as an attachment. Any remaining text sections are converted into attachment sections, and given fake file names (like "ATT00001.htm")"

    Confirmed as a problem by Microsoft with Exchange 07 & 10: .. if the messages follow the same pattern listed above that is.

    Author Closing Comment

    Thank you for your help!

    Featured Post

    Maximize Your Threat Intelligence Reporting

    Reporting is one of the most important and least talked about aspects of a world-class threat intelligence program. Here’s how to do it right.

    Join & Write a Comment

    Problem: You created a new custom form in Outlook for your contacts (added fields, deleted fields, changed the layout of fields, whatever) and made it the default form for contacts. The good news is that all new contacts will utilize the new form. T…
    I tend toward trying the newest hardware and software.  Thiss sometimes works out to my benefit, and sometimes not.  Because I downloaded and installed Android 5.x (…
    The purpose of this video is to demonstrate how to set up Lists in Mailchimp. This will be demonstrated using a Windows 8 PC. Mailchimp will be used. Log into your Mailchimp account. : Click on Lists. Click on Create List Button : Choose the desi…
    This Micro Tutorial will demonstrate the easy use of Gmail embedding images in your email so the recipient of your email can view them in context.

    746 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

    15 Experts available now in Live!

    Get 1:1 Help Now