Hi linuxquestions comunity,
please i'm looking for an answers about migrating from qmail to postfix:
1- is it possible without losing anything?
2- if it's possible how can i do it?

and please please i'm looking for help about this.

Thank you friends and Best regards.

NB: OS: DEBIAN_JESSIE

Read the "Question Guidelines" link in my posting signature. We're happy to help, but doing some small amount of research on your own, is the first thing you need to do. Putting "how to migrate from qmail to postfix" into Google pulls up LOTS...including links on this very site for the same question:
http://www.linuxquestions.org/questi...ovecot-731803/
http://www.linuxquestions.org/questi...ostfix-497616/
http://postfix.1071664.n5.nabble.com...x-td43778.html
https://www.len.ro/work/the-long-awa...il-to-postfix/

...and there is imapsync:
https://www.howtoforge.com/how-to-mi...-with-imapsync

Have you done any research on your own for this? We're happy to assist you if you're stuck, but you will have to show some effort on your own.

::EDIT:: Much the same as your other thread, where you came back and bumped it on your own after a short time, then never followed up/answered

1 members found this post helpful.

Thank you sir, those links are helpful, so i'll try my best to find a solution.
Best regards, have a nice day

You're welcome, but in the future, you really should try to look things up yourself before posting a question