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Add null SPF, DMARC, and MX records for automatically generated autoconfig, autodiscover, and mta-sts subdomains; add null MX records for custom A-record subdomains

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All A/AAAA-resolvable domains that don't send or receive mail should have these null records.

This simplifies the handling of domains a bit by handling automatically generated subdomains more like other domains.
This commit is contained in:
Joshua Tauberer
2021-05-09 08:59:44 -04:00
parent e421addf1c
commit e283a12047
3 changed files with 78 additions and 81 deletions
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2
management/web_update.py
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@@ -27,7 +27,7 @@ def get_web_domains(env, include_www_redirects=True, include_auto=True, exclude_
if include_auto:
# Add Autoconfiguration domains for domains that there are user accounts at:
# 'autoconfig.' for Mozilla Thunderbird auto setup.
# 'autodiscover.' for Activesync autodiscovery.
# 'autodiscover.' for ActiveSync autodiscovery (Z-Push).
domains |= set('autoconfig.' + maildomain for maildomain in get_mail_domains(env, users_only=True))
domains |= set('autodiscover.' + maildomain for maildomain in get_mail_domains(env, users_only=True))