MultipartRelated Start

[fenzad]

The code line:

ContentType.Parameters["start"] = "<" + value.ContentId + ">";

is right?
Thunderbird with this parameter with the characters < and > shows an empty message!

[jstedfast]

From rfc2387, we have this:

3.4.  Syntax

     related-param   := [ ";" "start" "=" cid ]
                        [ ";" "start-info"  "="
                           ( cid-list / value ) ]
                        [ ";" "type"  "=" type "/" subtype ]
                        ; order independent

     cid-list        := cid cid-list

     cid             := msg-id     ; c.f. [822]

Then, in rfc822, it defines msg-id as:

     msg-id      =  "<" addr-spec ">"            ; Unique message id

So it looks like Thunderbird is broken.

[fenzad]

In the rfc 822 i can find this:

---

3.2. The Start Parameter

The start parameter, if given, is the content-ID of the compound
object's "root". If not present the "root" is the first body part in
the Multipart/Related entity. The "root" is the element the
applications processes first.

---

So in 99 % of cases (including mine), the parameter is not necessary. If the parameter is not specified the message is shown correctly in Thunderbird.

[jstedfast]

Yep, I know it's not necessary. That doesn't make it not a bug in Thunderbird, though :-)

[jstedfast]

Can you file a bug on https://bugzilla.mozilla.org about the Thunderbird bug? Thanks.

[fenzad]

The bug already exists https://bugzilla.mozilla.org/show_bug.cgi?id=471402
from 2008...how sad :-(

thanks anyway, but in my condition I guess I'll have to edit and recompile the source code of mimekit.

[jstedfast]

I've added a work-around to not use a start parameter if it is the first part in the multipart. But shame on Thunderbird for not adhering to the specifications.

[fenzad]

Fantastico!
You are absolutely right!!! Shame!

There will be a new version for NuGet with this change?

[jstedfast]

Probably not until this weekend when I have time to make a release.

[fenzad]

Ok ... the weekend is a reasonable time.
I'm happy to wait!
Thank you very much!

[fenzad]

Hi...when a new release in nuget?

[jstedfast]

Sorry about that, I got distracted this past weekend. There will be a release this weekend for sure.

[fenzad]

Thank you very much!

[jstedfast]

I've released MimeKit 1.0.13 with this fix.