Sunnybox.io alternatives

Honestly this product is life changing. Having spent some time working at Intercom on emails and email templates, I admire the hard work the team has put in in making developing and sending email suck less. What I'd love to see in the coming months is really ironing out the painful parts of building emails in web apps, I've spent hours over the years fixing DKIM, DMARC, SPF and hard and soft bounces and would just love if Resend could take me by my hand and help me get up and running correctly I'd love it even more.