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Signed-off-by: Tyrolyean <tyrolyean@tyrolyean.net>
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Tyrolyean 2020-05-01 16:05:01 +02:00
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README
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@ -62,6 +62,7 @@ postfix website.
This program needs to be started via it's own systemd service on system boot. This program needs to be started via it's own systemd service on system boot.
You need to add the in and oputput ports to your postfix queue as described in You need to add the in and oputput ports to your postfix queue as described in
the link above. For example, a setup with the default values looks like this: the link above. For example, a setup with the default values looks like this:
|-------| SMTP |-----------| SMTP |-------| |-------| SMTP |-----------| SMTP |-------|
|POSTFIX| --> | MAILATTACH| --> |POSTFIX| |POSTFIX| --> | MAILATTACH| --> |POSTFIX|
|-------| n 4269 |-----------| n 4270 |-------| |-------| n 4269 |-----------| n 4270 |-------|
@ -72,6 +73,61 @@ the link above. For example, a setup with the default values looks like this:
|Attachments| |Attachments|
|-----------| |-----------|
POSTFIX CONFIGURATION
The following is an example postfix configuration which I deploy with opendkim
and spamassassin as well as mailattach itself:
master.cf:
smtp inet n - n - - smtpd
-o content_filter=scan:localhost:4269
-o receive_override_options=no_address_mappings,no_milters
smtps inet n - n - - smtpd
-o content_filter=scan:localhost:4269
-o receive_override_options=no_address_mappings,no_milters
... Rest of config file
scan unix - - n - 10 smtp
-o smtp_send_xforward_command=yes
-o disable_mime_output_conversion=yes
-o smtp_tls_security_level=none
localhost:4270 inet n - n - 10 smtpd
-o content_filter=spamassassin
-o receive_override_options=no_unknown_recipient_checks,no_header_body_checks,no_milters
-o smtpd_helo_restrictions=
-o smtpd_client_restrictions=
-o smtpd_sender_restrictions=
# Postfix 2.10 and later: specify empty smtpd_relay_restrictions.
-o smtpd_relay_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks=127.0.0.0/8
-o smtpd_authorized_xforward_hosts=127.0.0.0/8
-o smtp_tls_security_level=none
spamassassin unix - n n - - pipe
flags=R user=spamd argv=/usr/bin/vendor_perl/spamc -e /usr/bin/sendmail -oi -f ${sender} ${recipient}
Of course your configuration may vary, but I will try to explain some parts
which are important:
- In the first two smtp/smtps commands the no_milters option has been specified.
This was done to avoid dkim signing of the incoming email before it's
attachments have been removed. The same goes for the localhost:4270 service.
- The no_address_mappings options have been specified because "This is
typically specified BEFORE an external content filter. ". It disables address
macro expansion.
- The smtp_tls_security_level=none options in the scan and localhost:4720
services prevent postfix from starting a TLS connection via the STARTTLS
command. Note that this is ONLY INTERNALLY. It will receive external
STARTTLS connections.
The remaining configuration options have been more or less taken from the
postfix manual and are explained in more depth there:
http://www.postfix.org/FILTER_README.html
DIRECTORY CLEANING DIRECTORY CLEANING
If you want to regularly purge old files from the directory, you can start the If you want to regularly purge old files from the directory, you can start the