ToSend: subdomain capabilities
For those of us that use a staging environment or a subdomain, it would be super useful to have the ability to add API keys for subdomains since you are unable to add multiple accounts on one base URL.
I have a few domains with subdomains, but I don't set up email with the subdomains. They use the base domain.
That's partly about reputation. Subdomains do not inherit the reputation of the primary domain, so you have to build up the reputation of each subdomain. Why do that when using the same domain name will help establish your reputation and keep you out of the spam filter?
You also start to overload your DNS. Each subdomain needs its own SPF, DKIM and DMARC.
It also increases the surface area for attackers. Think of security in this four basic steps:
1: Identify the attack surface
2: Reduce the attack surface
3: Harden the attack surface
4: Raise the cost of an attack
When you have email for various subdomains, you expand your attack surface. You then have to spend more time hardening each subdomain, and it actually lowers the cost of an attack.
There's no real upside to using subdomain email capabilities.
All great points...thank you!
I would also like the ability to add subdomain too - for testing and for other reasons where the base domain is using MX records with MS or Google. E.g. em.mydomain.tld or something similar.
I run it on subdomains without issues. Just add the desired subdomain instead of domain and it works.
André Daus thanks, I added the base domain first, then tried adding a subdomain afterwards and it said no! I will likely delete the base domain and try again.