Recently we've got a client who's form submissions are being rejected by Google when we use SendMail for the form. This never used to be a problem, but in researching it, seems like since Jan 2020 it's been a thing for some other folks too.
Has anyone successfully implemented using the Gmail SMTP servers to power the Statamic forms? Care to share what the process was like for you to get this working?
We're wanting to use either our client's Gmail SMTP server info or a service like SendGrid or MailGun. If you've used SendGrid or MailGun, would be interested in recommendations or feedback about how quickly this can be setup from some folks who've done it. Did you have to update the DNS records for SG or MG to work correctly?