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Restrictions on recipient addresses
smtpd_recipient_restrictions
This parameter specifies restrictions on recipient addresses that SMTP clients
can send in RCPT TO commands.
These destinations do not need to be listed in
$relay_domains.
The following restrictions are available (* is part of default setting):
- *permit_mynetworks: permit if the client address matches
$mynetworks.
- reject_unknown_client: reject the request if the client hostname is unknown.
- reject_maps_rbl: reject if the client is listed under
$maps_rbl_domains.
- reject_invalid_hostname: reject HELO hostname with bad syntax.
- reject_unknown_hostname: reject HELO hostname without DNS A or MX record.
- reject_unknown_sender_domain: reject sender domain without A or MX record.
- *check_relay_domains: permit only mail:
Reject anything else.
- permit_auth_destination: permit mail:
- reject_unauth_destination: reject mail unless it is sent
- reject_unauth_pipelining: reject mail from improperly pipelining spamware
- permit_mx_backup: accept mail for sites that list me as MX host.
- reject_unknown_recipient_domain: reject domains without A or MX record.
- check_recipient_access maptype:mapname: look up recipient address, parent domain, or localpart@.
Reject if result is REJECT or "[45]xx text".
Permit otherwise.
- check_client_access maptype:mapname: see
smtpd_client_restrictions.
- check_helo_access maptype:mapname: see
smtpd_helo_restrictions.
- check_sender_access maptype:mapname: see
smtpd_sender_restrictions.
- reject_non_fqdn_hostname: reject HELO hostname that is not in FQDN form.
- reject_non_fqdn_sender: reject sender address that is not in FQDN form.
- reject_non_fqdn_recipient: reject recipient address that is not in FQDN form.
- reject: reject the request. Place this at the end of a restriction.
- permit: permit the request. Place this at the end of a restriction.
Restrictions are applied in the order as specified; the first
restriction that matches wins.
Specify a list of restrictions, separated by commas and/or whitespace.
Continue long lines by starting the next line with whitespace.
NOTE: YOU MUST SPECIFY AT LEAST ONE OF THE FOLLOWING RESTRICTIONS
OTHERWISE POSTFIX REFUSES TO RECEIVE MAIL:
reject, check_relay_domains, reject_unauth_destination
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