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Anyone had this problem (this was an email sent to me describing the problem)?

"I recently sent a PDF file attachment to our mailing list from my IMAP account using

Several people using Outlook received it not as an attachment but in an
inline encoded format, which baffled them.

When I sent the PDF to them individually, they received it as an attachment.

Could the mailing list or other group alias on the mailserver be turning
attachments into inline encoded text?"

Everyone he sent this to is on our LAN using our KMS 6.2.0. All the outlook users he is talking about is using the KOC. However, one of the users uses PC PINE connecting with IMAP. So, I guess its not a KOC problem.

Is anyone having problems with mailing lists built into KMS corrupting attachments?


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A few version of Thunderbird had real problems with attachment encoding. They didn't put it in the proper MIME format so other mail readers just saw the raw text rather than an MIME encoded attachment.

Keep in mind, e-mail is purely a 7-bit text only format. Attachments were the last thing in the minds of the orignal authors of e-mail when it was born. In order to send attachments they have to be "changed" into a text like format that needs to be properly encoded by the sending mail application and properly decoded by the recieving mail application. Try making sure your Thunderbird version is up-to-date, might even try a beta version.

Or, better yet, use Kerio's web mail to send those messages to the list. Kerio's web mail arguably beats Thunderbird in IMAP configuration for full functionality and proper operation.

[Updated on: Wed, 09 August 2006 15:06]

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