I have a worker that sends an email with MailChannels, exactly as in the first example here: https://blog.cloudflare.com/sending-email-from-workers-with-mailchannels/
when emails are received into my test inbox, Gmail flags them with warnings:
Gmail couldn't verify that runestone.io actually sent this message (and not a spammer)
I did some digging and updated my DNS for that domain with the following SPF record:
v=spf1 include:relay.mailchannels.net ~all
But that didn’t seem to work, and anyway if you setup Cloudflare email routing, it makes you overwrite the SPF for mailchannels:
What’s the solution here? Is there any detailed documentation on how to setup email correctly?