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content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md
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@ -1,6 +1,6 @@
+++
date = '2024-11-19T16:29:01Z'
draft = true
date = '2024-11-24T16:29:01Z'
draft = false
title = 'How to Set up a Mail Server on Alpine Linux with Postfix and Dovecot'
tags = ['mail server', 'alpine linux', 'postfix', 'dovecot']
+++
@ -1368,7 +1368,7 @@ The `fo` tag indicates when you would like to receive reports. The options are:
</tr>
</table>
### OpenDMARC[^spf_processing_redundancy]
### OpenDMARC[^spf_processing_redundancy] {#opendmarc}
We can use software called OpenDMARC to enforce DMARC policies for incoming mail. OpenDMARC is another milter. Let's
install it and enable its service:
@ -1479,14 +1479,12 @@ And when you receive emails from a legitimate source that implements DMARC, you
your emails:
<pre id="double-spf-headers">
<code>
Received-SPF: pass (protonmail.com: Sender is authorized to use 'revsuine@protonmail.com' in 'mfrom' identity (mechanism 'include:_spf.protonmail.ch' matched)) receiver=master.revsuine.xyz; identity=mailfrom; envelope-from="revsuine@protonmail.com"; helo=mail-40130.protonmail.ch; client-ip=185.70.40.130
<code>Received-SPF: pass (protonmail.com: Sender is authorized to use 'revsuine@protonmail.com' in 'mfrom' identity (mechanism 'include:_spf.protonmail.ch' matched)) receiver=master.revsuine.xyz; identity=mailfrom; envelope-from="revsuine@protonmail.com"; helo=mail-40130.protonmail.ch; client-ip=185.70.40.130
DMARC-Filter: OpenDMARC Filter v1.4.2 master.revsuine.xyz 88CFF1288D1
Authentication-Results: OpenDMARC; dmarc=pass (p=quarantine dis=none) header.from=protonmail.com
Authentication-Results: OpenDMARC; spf=pass smtp.mailfrom=protonmail.com
Authentication-Results: master.revsuine.xyz;
dkim=pass (2048-bit key; secure) header.d=protonmail.com header.i=@protonmail.com header.a=rsa-sha256 header.s=protonmail3 header.b=nc4YWVM/
</code>
dkim=pass (2048-bit key; secure) header.d=protonmail.com header.i=@protonmail.com header.a=rsa-sha256 header.s=protonmail3 header.b=nc4YWVM/</code>
</pre>
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