https://simpleemailapi.dev/ weekly 0.7 https://simpleemailapi.dev/about weekly 0.7 https://simpleemailapi.dev/blog weekly 0.7 https://simpleemailapi.dev/privacy weekly 0.7 https://simpleemailapi.dev/terms weekly 0.7 https://simpleemailapi.dev/blog/email-delivery-best-practices weekly 0.7 https://simpleemailapi.dev/blog/resend-alternative-indie-hackers weekly 0.7 https://simpleemailapi.dev/blog/sendgrid-alternative-2026 weekly 0.7 https://simpleemailapi.dev/blog/transactional-vs-marketing-emails weekly 0.7 https://simpleemailapi.dev/blog/what-is-email-api weekly 0.7