Mailgun
How to configure alf.io to send e-mails using Mailgun APIs
Mailgun is an US/EU-Based transactional email service.
Please refer to the official documentation for details about the API Keys generation
GDPR Compliance
If you are subject to GDPR, please make sure to create your account on their EU region.
Then enable the Use Mailgun EU region flag. This will instruct alf.io to call Mailgun’s EU API endpoint.
Last modified 19.11.2019: porting of heroku tutorial (#827) (1a0cb56e)