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by tamimio 1033 days ago
> behalf of users, using their own personal emails,

You can’t, if I’m understanding it correctly, otherwise you are spoofing it and mostly it will end up in spam black lists. You can create an alias (and do all the usuals like SPF, DMARC, DKIM, TLS, etc to ensure the security part) and then forward it to users emails, and make it seamless so users don’t see it.
1 comments
LeonM 1032 days ago
> You can’t

You can, but as long as the user owns the domain they are sending with.

If the domain owner authorizes you as a delegated sender using SPF and DKIM, then you can send email as anyone@domain.tld.

However, I recommend the OP learns about how email works before diving into such venture.

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tamimio 1032 days ago
If you own the domain you can pretty much do anything, from hosting your own email to having unlimited aliases, but I believe OP question is a bigger scope as said “personal emails”, so that also includes emails from other providers like gmail etc., so I stand corrected (if I understand OP requirement correctly anyway), you can’t unless you are spoofing it, which is useless as it will end up in the black list anyway.
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