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Ideally you don't want to send an email only to find out it doesn't exist, in terms of marketing. Do that too often and servers can start black listing your do
by irjustin 5y ago
Ideally you don't want to send an email only to find out it doesn't exist, in terms of marketing.
Do that too often and servers can start black listing your domain/IP because it looks like you're "scanning" for available email addresses.