Sahil Tandon wrote:
On Wed, 18 Feb 2009, jeffs wrote:
On Wed, 18 Feb 2009, jeffs wrote:
Thank you for your prompt reply.
No problem, but please do not top-post; place all future replies *below*
quoted text. Thanks.
I am working on a project in which -- depending on the level of the
users subscription -- either their mail is delayed for at least 2
hours or it is sent out immediately. Actually, I could use some
advice on the best way to implement this. Because of the
application in use all email whether or not it belongs to one group
or another, originates from the same domain. It is an application
sitting on the smtp server which processes mail for the application.
The users fill in a form and depending on their level of
subscription, the values from the form are converted into an email
message, go out right away or are delayed. So, as far as the smtp
server is concerned , all mail originates from the same user but in
fact gets destined for different recipients. The application can ad
tags or codes to the individual messages to indicate which group
they are in so perhaps if postfix can look inside the message or
something and see the tag or code, it can then decide if it should
delay or deliver immediately the message.
I hope I'm making myself clear and please ask if you need clarification.
Why not configure your application to inspect the mail and, depending on
your criteria, submit to Postfix immediately or after a two hour delay?
You raise an interesting twist. The mail is sent out via php -- I
really don't know how to make it delay the submitting of the mail to
postfix unless you might have some ideas on that one. I'm very good
with cron jobs and I was thinking if I could only get one group of
messages into a queue or delayed queue then I could fire off the cron
job every few hours, but I'm at a loss as to what queue and how to get
it into that without postfix gobbling it up and sending it out right
away.
I did look at defer_transports and that looks promising. Would I simple
put defer_transports = smtp in the main.cf or do I have to fiddle with
other settings someplace too? I'd prefer something a little more
elegant than defer_transports unless I can, again, specify somehow which
mails are to be delayed.
You needn't fiddle with other settings. To deliver deferred mail, issue the
"sendmail -q" command.
Okay that works -- thanks for your help!
