Ask HN: Email Domain reputation – From, MailFrom, Signed-by Which one counts?
After researching this topic, I couldn't find a straight answer and tbh I'm a bit confused now.To protect the reputation of your root-domain, using a subdomain with a different IP for transactional mails or newsletters seems to be the general advice (best practice).A different IP makes sense, since a lot of blacklists and mailfilters are IP based.But what about the following scenarios: from:...