[courier-users] Re: fuzzy mime boundaries

[Alessandro V. <ve...@ta...>]

Sam wrote:
> Alessandro Vesely writes: 
> 
>> My filter complains it cannot understand such MIME structure,
>> it dumps a copy of the message and blocks it. So I have to
>> manually look at it, run reformime -r and send it over again.
>> Reformime returns a valid MIME structure.
> 
> I doubt that the output from reformime includes all the attachments, 
> unmolested.  Count the boundaries in the reformatted mail. 
> 

In that case it does, because the last attachment was absolutely
(i.e. without even a blank line) empty. In general yes, a boundary
may live as text in the body of another entity. Will some "smart"
client recognize it and decode the attachment? 

When MIME came out it standardized and enhanced the practice of
hand writing boundaries, typically like the following:
 --8<--- cut here ---- 

The standard says the boundary value should never appear in the
body, but it is not clear how to handle a message when that
prescription is not observed. 

Salutations
Ale