| component | software | |
|---|---|---|
| smtp | postfix | |
| imap | dovecot | |
| webmail | roundcube | |
| spam filter | spam assassin | do spam filter while smtp connection open - run spamd |
| glue | postprox | |
| antivirus | none | don't use clamav |
| domain key signing | opendkim | |
| get notifications about spam | dmarc |