Brandon Keepers wrote:
I'm working on an application that is backed by Postfix 2.3.8 and
Dovecot 1.0.13, configured with virtual domains, for handling messaging.
I need to be able to send the notification (such as "You've received a
new message on SomeAwesomeService. Click here to check it out", It's
evil, I know) to a different email address, such as a mobile device.
Eventually, we want to do other things like clear web page caches when a
message is received, or sending IM notifications, but that's for another
day.
as you say, it's evil... you can try to reduce the "evilness" by not
doing the notification in real time. I mean take few minutes so that you
send one notification if you get multiple messages during a short period
of time.
So basically, we want to notify our application whenever a new mail is
received, and it can do all the magical things that it needs to do.
I was hoping to get some feedback on the different approaches I'm
looking at. From what I can tell, there's not a way to deliver to
multiple virtual transports in postfix, so here's the options I see:
you can use virtual_alias_maps or one of the bcc options to deliver a
copy of the message to a mailbox that does what you want.
* Content filter
I could set up a "content filter" that just delivers the mail to the
application, and then re-injects it back into postfix. This seems like
more work than the other options just because I have to worry about
re-injecting the message
* Intercept delivery
Replace the dovecot deliver command with a custom one that calls the
dovecot deliver and then passes the message on to the application. I've
written a little proof of concept for this and it seems to work, but
just seem shady.
This is better. just make sure to pass arguments "securely". once you do
your notification, simply run dovecot with the same command line args as
you would use in master.cf.
* Sieve
Dovecot supports Sieve, so I could just have a global sieve script that
sends the notifications. This is definitely the solution I'm leaning
towards.
I don't know if you can exec from dovecot-sieve.
Are there any better options? Do you think this will have a significant
impact on performance? Am I crazy?
depends on how much they pay :)
