Summary
This setup use OpenSMTPd, Dovecot2, Amavis (embedded Spamassassin) and Clamav.
This have been designed for simple hosting, no virtual, and use PAM / UNIX Users maildir.
This use OpenSMTPd 5.7.3p2 only for now.
Used ports
| Software | Port | Usage | Should be public (opened from external) |
|---|---|---|---|
| OpenSMTPd | 25 | Auth optional, default smtp ports | yes |
| OpenSMTPd | 465 | Auth required, default smtp ports | yes |
| OpenSMTPd | 587 | Auth required, default smtp ports | yes |
| OpenSMTPd | 10025 | Mails from Amavis, tagged Filtered | NO |
| OpenSMTPd | 10027 | Mails from Amavis, tagged Signed | NO |
| Amavis | 10024 | Amavis, default path | NO |
| Amavis | 10026 | Amavis, path for signing with DKIM | NO |
| Dovecot2 | 993 | Imaps | yes |
| Dovecot2 | 143 | Imap(s) | yes |
| Dovecot2 | 4190 | ManageSieve, remote Sieve rules editing | yes |
Flow
Receiving
- Email received by OpenSMTPd
- Email passed to Amavis on port 10024
- Amavis use embedded spamasassin and call Clamav to check for viruses and spam
- Amavis transfert back the email to OpenSMTPd on port 10025
- OpenSMTPd finally transfers the email to Dovecot by socket
/var/run/dovecot/lmtp
Sending
- Email received by OpenSMTPd
- Email passed to Amavis on port 10026
- Amavis does signing on the email
- Amavis transfert back the email to OpenSMTPd on port 10027
- OpenSMTPd delivers the email
Setup
- Get the configs here
- cd setup_mail
- grep -r your-server.io .
- edit whatever you need
- copy configs where needed and start services
Versions used (as now, and packages names for debian 8)
- amavisd-new 1:2.10.1-2~deb8u1
- clamav 0.99.2+dfsg-0+deb8u1
- clamav-daemon 0.99.2+dfsg-0+deb8u1
- clamav-freshclam 0.99.2+dfsg-0+deb8u1
- spamassassin 3.4.0-6
- OpenSMTPd 5.7.3p2 && ./configure --with-pam --with-ca-file=/etc/ssl/certs/ca-certificates.crt
- DCC (for spamassassin) ; build it yourself
- See mail logs for parsers managed by amavis, you will need like: p7zip, unrar, cabextract, rpm2cpio, etc.
Notes
- Edit whitelists and trusted_networks in
spamassassin/local.cf
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