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Results tagged with spam
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user 229501
Unsolicited e-mail, comments or posts, often sent out in large volumes; possibly but not necessarily commercial in nature
1
vote
How to deal with outgoing spam flooding with Postfix
SASL-authenticated clients using your mail server to send out spam or malware are usually the result of botnets. … You can catch most if not all of botnet-like behaviour using postfwd rules and the Postfwd Anti Geoip Spam Plugin which will check for both high rates of sending as well as logins from more than one country …
- 507
0
votes
1
answer
15
views
Amavis outbound mail filter for Postfix?
Running Postfix on Ubuntu 22.04, I'd like to make sure all outgoing mail originating from the server (eg mail forms on websites and stuff) is filtered for spam and malware. …
- 507
0
votes
1
answer
269
views
Postfix: Optimising order of spam checks?
reject_unknown_sender_domain
smtpd_recipient_restrictions =
smtpd_relay_restrictions =
permit_mynetworks,
# Rate limiting + geolimiting with postfwd
# See https://github.com/Vnet-as/postfwd-anti-geoip-spam-plugin …
- 507
0
votes
0
answers
10
views
Should smtp_helo_name always be the same as your MX record?
I can't seem to satisfy HELO checks on SPF records in all cases. I have an SPF record for my domain like this:
"v=spf1 mx -all"
The MX records in the zone are:
mx0.mydomain.org.uk. 3600 IN A …
- 507
0
votes
1
answer
445
views
Postfix: How to malware & spam scan outgoing SMTP SASL auth users?
relay_recipient_maps=
-o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_address_mappings
How do I go about putting SASL senders (who are by definition not on my network) through a spam …
- 507
0
votes
Accepted
Postfix: How to malware & spam scan outgoing SMTP SASL auth users?
$mydomain" );
# I've got multiple IP addresses on my machine and only want one to be used for mail:
@inet_acl = qw(127.0.0.1 [::1] 185.73.x.x [2001:ba8:0:x::x]);
15-content_filter_mode: enable spam … policy_banks:
$interface_policy{'10024'} = 'INTERNAL';
$policy_bank{'INTERNAL'} = { # mail originating from clients in cidr:/etc/postfix/internal_clients_filter
bypass_spam_checks_maps => [0], # spam-check …
- 507