[imp] Dynamic mailer config based on FROM and TO addresses

[Michael M Slusarz]

Quoting Robin Bankhead <horde at headbank.co.uk>:

> Hello,
>
> I am hoping to use Horde/Imp (latest horde-webmail from PEAR) with  
> Apache James v3 (eternal beta) as IMAP server and local delivery  
> agent.  The local mailstore will be receiving mail from a number of  
> domains/accounts, but it has no true FQDN of its own, so everything  
> gets fetched into a single @localhost IMAP mailbox.  That IMAP login  
> is set to autologin in horde main config, and Imp uses it via  
> $servers['imap']['hordeauth'] = 'full'.
>
> The James SMTP server *could* relay all outgoing mail for all these  
> domains, but in my testing this has garnered high spam scores, even  
> when clients are locally doing SMTP AUTH.  I guess this is because  
> of our lack of an originating FQDN.
>
> I'd therefore like to have Imp choose the SMTP server config  
> dynamically upon sending, based on both From: and To: addresses of  
> the outgoing message.  The user would choose the From: address using  
> a list of Identities defined in global prefs.  The
>
> The things I need to know are:
>
> 1. Can this be implemented at all? (I reckon it can, but...)

Sure.  But you will have to directly change the source.

> 2. Would I implement it by a routine in one of the conf files (I  
> have done it like this before, for turba config circa H4) or would I  
> need to use a Hook?

No.

> 3. Where do I find the variables I need for
>  (a) The From: address or Identity, and
>  (b) the To: address?

Just grab them from the code.  You want to look at the  
IMP_Compose#sendMessage() method (imp/lib/Compose.php).   
$GLOBALS['injector']->getInstance('IMP_Mail') returns the mail  
transport object - you will need to replace that with whatever code  
you need to create the proper mailer object needed based on the  
addresses.

michael

___________________________________
Michael Slusarz [slusarz at horde.org]