Sudden 429 (Bad Request) when sending magic link

[Cathy_Sarisky]

Your outgoing transactional email (sign-ups) go via SMTP, and I wonder if your host has blocked whatever port you’re using. (DO recently made some changes in this area.)

You might switch over to using the Mailgun API for outbound email - see this.

Make onboarding emails also work via API (not only SMTP)

heh my bad, I saw the section and walked read right past it Reading the wrapper code and nodemailer-mailgun-transport docs, I think something like this might work: "mail": { "transport": "mailgun", "options": { "host": "<>", "auth": { "api_key": "<>", "domain": "<>" } } }