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Sending to people who didn't opt-in will get your SMTP account banned.
Adds a digital signature to verify the email hasn't been faked.
Sending 100,000 emails from a brand-new "unlimited" server on Day 1 is a guaranteed way to get blocked. Legitimate sending requires "warming up" the IP over several weeks. ✅ Better Alternatives
Known for the fastest delivery and best inbox rates. 💡 Key Tips for Success