Hi,

with my current configuration (relevant part):

smtpd_client_restrictions =
  check_client_access hash:$config_directory/client_access
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_helo_required = yes
smtpd_relay_restrictions =
  reject_non_fqdn_recipient
  reject_non_fqdn_sender
  reject_unknown_sender_domain
  reject_unknown_recipient_domain
  check_sender_access regexp:$config_directory/tagfordkimsign
  permit_mynetworks
  reject_unauth_destination
  reject_multi_recipient_bounce
  reject_non_fqdn_helo_hostname
  reject_invalid_helo_hostname
  check_sender_access hash:$config_directory/sender_access
  reject_unknown_client_hostname
  reject_rbl_client zen.spamhaus.org
  reject_rbl_client bl.spamcop.net
  reject_rhsbl_reverse_client dbl.spamhaus.org
  reject_rhsbl_helo dbl.spamhaus.org
  reject_rhsbl_sender dbl.spamhaus.org
  check_policy_service inet:127.0.2.12:10023
  check_sender_access regexp:$config_directory/tagfordirectsend
  permit



... Microsoft's servers are frequently being (temporarily) blocked by
spamcop:

Jan 27 10:47:20 mx1 postfix/smtpd[67827]: NOQUEUE: reject: RCPT from 
mail-db8eur05on2106.outbound.protection.outlook.com[40.107.20.106]: 554 5.7.1 
Service unavailable; Client host [40.107.20.106] blocked using bl.spamcop.net; 
Blocked - see https://www.spamcop.net/bl.shtml?40.107.20.106; 
from=<sen...@example.org> to=<recipi...@example.org> proto=ESMTP 
helo=<EUR05-DB8-obe.outbound.protection.outlook.com>

Is there a way to override rbl block for particular domains? Would
adding 'example.org OK' to sender_access (above rbl blocks, as in my
config) be appropriate action?

Would rbl_reply_maps be better solution? I tried to understand it and
find some configuration examples but failed.

Any other way?

Thank you in advance,


-- 
Before enlightenment - chop wood, draw water.
After  enlightenment - chop wood, draw water.

Marko Cupać
https://www.mimar.rs/
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