File attachments are not mime formatted correctly

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I've tried sending emails with attachments several times now from RoundCube mail. Depending on the client reading the email, the attachments may or may not be useable.

SquirrelMail doesn't like them. MS Outlook doesn't like them. Thunderbird seems to deal with them OK. RoundCube mail deals with them OK.

The most recent email I sent with attachment from RoundCube, was trapped by my corporate SurfControl box with an 'invalid MIME format' error.

Outlook also doesn't seem to recognize the MIME formatting.

Not sure what could be wrong with the formatting, but it ought to be looked at any way.

BTW: RoundCube is pretty impressive so far. Very nice.

Thanks,

• --Ben