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PSA: Randomly switching your sending email domain to a different one on lists with hundreds of thousands of subscribers is a terrible idea for a variety of reasons...
a thread...
a thread...
1: No one recognizes your new domain. No one... Not your subscribers or the mailbox providers (Gmail, Yahoo, Hotmail, Apple, etc) that you're sending to.
2: #1 results in your subscribers marking your emails as spam because they don't recognize you anymore.
3: #1 results in mailbox providers throwing your emails in the spam folder because you haven't built any history of sending to hundreds of thousands of people from those domains. Legit businesses don't get that many subscribers overnight, they build them over years...
4: spammers show up in the wild with new domains and huge email lists. When you do the same thing, expect your emails to get treated like spammers do.
5: If you must switch domains for some business organization reason, you must gradually build reputation on that new domain by sending low volumes of email to your most engaged subscribers and build up over many weeks or even several months to full levels.
