Modifying the contents of a message

Axel axel.grude at
Thu Jan 26 15:36:56 UTC 2012

Hi Johnathan,

I am not too sure about modification of the message body (doesn't purge attachments do 
something similar?), but I would certainly be interested in a scriptable interface 
that would make it easy to manipulate any header fields. E.g. there is one problem 
with smtp servers modifying from addresses or "decorating"subject lines "[might be 
spam]" which are big annoyances and IMO a perfect use case for extensions to deal with.

Also, is there any way to go through gloda and flow back changes from there into the 
messages? ( I don't know if this is practical from the implementation POV, I just 
thought I throw the idea out there)


On 26/01/12 15:19, Jonathan Protzenko wrote:
> Hi everyone,
> Ever since I started reading the and 
> newsgroups, a recurring question about Thunderbird has been 
> "how can I modify the contents of a message" from an addon? I recently (less than 7 
> days ago) replied to this question twice, and my answer was basically:
> - inject a message in a local folder,
> - copy it to the destination folder,
> - remove the old message.
> I'm not sure there's a better way, but I guess not. My question is: could we make 
> that easier by implementing, say, in C++, nsIMsgFolder::InjectMessageFromStream, 
> making it of course scriptable? The arguments are:
> - this is something an addon will want to do, and it seems legitimate that they 
> should want to do so,
> - it's better to provide a function for that than to have someone do it real, real 
> wrong.
> I'm not very familiar with that area, so I'd be interested in hearing what others 
> have to say on the matter :).
> Cheers,
> jonathan
> _______________________________________________
> tb-planning mailing list
> tb-planning at

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