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SMTP server throwing 400
I'm trying to enable SMTP server for customising the email template , even after filling all the important details it's throwing error 400, couldn't connect SMTP server.
I'm using the resend SMTP server
TL;DR
Developers are trying to enable SMTP server for customizing email templates but are encountering error 400 even after filling in all the necessary details. They are using the resend SMTP server. 