Send automatic mail

sri.tech23

Have this requirement where a client enters a complaint date and time in his CRM form which is a customized form not part of std nav. the req is this : if 24 hrs have passed and there is not response on the complaint, a mail should go to the immediate superior and if 48 hrs have gone without any response then a mail should go to the CRM manager. The queries on my side are :

1. what should trigger the mail...ie only thing i can check is the date time of entry (available on the form) and the status of response (also available on the form). I need to compare it with the current system time. But what should trigger the mail to be sent.

2. which codeunit to use for sending mail.

I know business notification is the right way to do it, but if we have to do it through coding what would be the best way.

also can a customised form and table be used in Business notification...

mgm

1. use the job queue
2. take a look at smtp