My Mailserver is spamming.

[soba@ukw.edu.pl]

I think postfix is ​​not a very secure mail server. I propose to set up Zimbra, so that sent inside and outside messages (for example) using the external EXIM server (it is possible) - if you have questions I serve with.

What are the benefits of this solution (for example)?

- FREE real time inside and outside the e-mails backup (in exim: exim mail backup transport and route section))
- full secure SMTP server (for outside and inside network smtpp users)
- simple full configuration of the MTA and use your own scripts in the EXIM
- use multiple web clients (WEBMAIL), like horde and squirrellmail (use zimbra imap server and exim smtp server for send email) and standard Zimbra WEBMAIL.