[MlMt] New messages now have "To:" pre-filled-in

[Benny Kjær Nielsen]

On 21 Mar 2012, at 6:27, Robert Ricci wrote:

>> I can't figure quite out what triggers it but it does seems to have 
>> something to do with whether a message from a mailing list is 
>> currently selected in the messages pane.
>
> This has been the case for me as well. I've noticed that it doesn't do 
> this for *all* mailing lists, just some of them. The common factor 
> appears to be the presence of a 'List-Post' header in the selected 
> message: if I'm displaying a message that has this header when I 
> compose a new message, the value of that header gets pasted into the 
> To: field.

That is a precise description of the behavior. It is intended as a 
feature, but obviously this thread shows that this is not how the 
majority of users see it (currently I'm the only part of the minority). 
I'll first explain and then I'll show you how to change the behavior.

I have many email aliases and most of them are not explicitly defined in 
the [“Email 
Address(es)”](http://manual.mailmate-app.com/account_setup) field of 
the account settings. This works if MailMate can derive the address from 
the headers of the replied message. The address is then used as the 
default for the `From` header of the new message. For example, I do this 
with my email address for this list.

Now, the problem is that some times I need to create a new message for 
the list and since I have not put the address in the account settings 
then the address is not available in the list of `From` addresses. 
Therefore, by default, the `From` address is derived from the currently 
selected mailbox/message. This is how it also worked in previous 
versions of MailMate. The new thing is that the `To` header is also 
pre-filled if there is a `List-Post` header available in the current 
context.

How to change this behavior: The derivation of a `From` address can be 
disabled using a hidden preference. This also has the side-effect of 
disabling the derivation of the `To` address. Here is a quote from the 
Help book:

---

When creating a new message (not a reply) then the default `From` 
address is based on the current context (mailbox and currently 
displayed/selected messages). You can override this behavior using the 
following hidden preference:

	defaults write com.freron.MailMate MmDefaultAccount -string 
'imap://username@imap.example.com'

The default `From` address is then the first address defined for the 
account. In any case, as soon as you update the `To` header then the 
`From` address is updated if you have previously sent anything to the 
same recipient.

---

(An exact string to be used for the above can be seen in the `serverURL` 
fields of the `Sources.plist` file in `~/Library/Application 
Support/MailMate/`.)

The above will have to do for now. I expect to release 1.4.1 today, but 
I'll think about how to improve the default behavior. I'll probably 
implement the above hidden preference using a popup in the Composer 
preferences pane and let the first account be the default. And then I 
need to figure out an alternative approach to handle creation of new 
messages using address aliases.

-- 
Benny
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