What do we know about lease-granting domains? Do the lease-holders use their domains to send mail? Is the parent domain used to send mail? Do we have any examples that participate in DMARC now?
The only example I have encountered is an ISP, where clients are given a primary account of [email protected] and a website of username.isp.net. The leased domain name of username.isp.net would be important for cross-site-scripting, but would not be relevant for us because the lease cannot be used for email. Doug Foster
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