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# Domain whitelist via valid DMARC policy (aligned SPF and/or aligned DKIM)
comodo.com
geotrust.com
geotrusteurope.com
howtoforge.com
ispconfig.org
# Domain whitelist via valid DMARC policy (aligned SPF and/or aligned DKIM)
comodo.com
geotrust.com
geotrusteurope.com
howtoforge.com
ispconfig.org