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I see many companies using the colorful emojis in the subject line but when I try with Sendy it does not work.
Is this something that can be supported?
Sendy supports usage of emojis both in the subject line or body of your email since version 2.0.8 → https://sendy.co/get-updated#208
You’d need to set $charset to 'utf8mb4' in /includes/config.php in order for emojis to work.