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The original was posted on /r/sysadmin by /u/rahvintzu on 2024-01-23 04:21:45+00:00.
In light of SPF limits and the benefits of segregating for improved reputation scoring.
How are people handling subdomain naming?
Originally i was considering generic subdomains so you could have a few vendors under one subdomain.
Example
newsletters.domain.com
Then define three newsletter services under 'newsletters.domain.com'.
The issue here is some providers will want to define their own MX for bounce back and MX validation will fail if multiple are listed.
Is everyone else just going with a one to one mapping for third parties to subdomains?
Example
productname.domain.com