IRedMail/FAQ/Quarantining.Messages

From iRedMail

When amavisd detects a spam email, it logs a message to its log file by default. It can also quarantine the email and/or notify an administrator. It can then generate a bounce message to the sender. Finally, it can either accept and deliver the message, or discard the message. Many different configuration variables are involved in these decisions.

Enable a spam quarantine by setting the following variables:

$QUARANTINEDIR = '/var/virusmails';              # Quarantine Directory
$final_spam_destiny = D_DISCARD;
$spam_quarantine_method = 'local:spam-%b-%i-%n'; # Filename in $QUARANTINEDIR
$spam_quarantine_to = 'spam-quarantine';         # Put Spam in Quarantine Directory
# $spam_quarantine_to = "postmaster\@$mydomain"; # Send Spam to Adminstrator
# $spam_quarantine_to = undef;                   # Do nothing with Spam
$spam_admin = "martin.zahn\@$mydomain";          # Where to send Notification

The following symbolic constants can be used in $final_spam_destiny:

• D_DISCARD: Mail will not be delivered to its recipients, sender will NOT be notified. Effectively we lose mail (but will be quarantined unless disabled). Losing mail is not decent for a mailer, but might be desired.
• D_BOUNCE: Mail will not be delivered to its recipients, a non-delivery notification (bounce) will be sent to the sender by amavisd-new; Exception: bounce (DSN) will not be sent if a virus name matches $viruses_that_fake_sender_re, or to messages from mailing lists, or for spam level that exceeds the $sa_dsn_cutoff_level.
• D_REJECT: mail will not be delivered to its recipients, sender should preferably get a reject, e.g. SMTP permanent reject response.

References:

• Fighting Spam/Viruses with Amavisd-New, Maia and Postfix