Hello OpenSMTPD!
I am using opensmtpd portable 5.3.3p1 on my raspberry pi with the
following configuration:
listen on lo
listen on eth0 tls certificate mail.pragmasec.nl auth-optional hostname
mail.pragmasec.nl
listen on eth0 port 587 tls certificate mail.pragmasec.nl auth hostname
mail.pragmasec.nl
expire 7d
table vdomains "/usr/local/etc/vdomains"
table vusers "/usr/local/etc/users"
accept from any for domain <vdomains> virtual <vusers> deliver to mda
"procmail -f -"
table aliases db:/usr/local/etc/aliases.db
accept for local alias <aliases> deliver to mda "procmail -f -"
accept for any relay
My question is if there are ways to reduce spam?
I am using procmail with spamassassin to tag the spam but it would be
nice to block certain mailers at SMTP level (for example HELO, RBL, SPF,
URIBL level).
Is this possible ?
I read something about certain helo checks? how would I check for valid
helo hostnames in the smtp transaction?
Kind regards,
Michiel
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