Save mails into custom DB

[Merve Temizer]

Hi, i have a question.
What is the most appropriate way to save mails into a database that i built
before. I mean, i have a custom structured database and i need to save
mails into that database. Some time ago i was using James server and wrote
a bunch of Java code, Also i had a chance to use JPA but i decided to use
Postfix for some reason this if you can are some idea on how can i save
mails and everything in 'my daabase', would be appreciated.