Modify stored mail contents?

[Jerry]

>> On Sat, 22 Jul 2017 12:51:15 +0200, Evan Martin stated:
>>  
>>> Is there a safe way to modify the contents of emails stored by
>>> Dovecot? I'll probably only want to change the message bodies, not
>>> the headers, if that matters. Looking for ways to do this both for
>>> existing emails and new emails as they are received (though anything
>>> that works for existing emails can probably just be run again for
>>> new emails.) My mail storage is currently mdbox, but I could
>>> migrate to another format if that helps.  

> On 22/07/2017 3:56 PM, Jerry wrote:

>> You could just view the message in your MUA and then save it to
>> another drive, or whatever. Then, using a text editor, you could
>> modify it to your hearts content.
>>
>> Exactly, what problem are you trying to address?

On Sat, 22 Jul 2017 16:05:19 +0200, Evan Martin stated:

> Yes, obviously clients can save messages. I meant: to modify messages
> in bulk, on the server, replacing the existing message bodies stored
> by Dovecot.

I am not understanding what problem you are trying to alleviate. Are
these your messages or those of your clients?

-- 
Jerry