OpenSMTPd Filter

Remove Received header from incoming mails, e.g., to obfuscate the source address of a moving device.

Inspired by postfix's (more restrictive) header_checks, e.g.:

/^Received: .* example.org/ IGNORE

See also

• man smtpd.conf.5
• man smtpd-filters.7
• https://github.com/jirutka/opensmtpd-filter-rewrite-from