I send only transactional emails (confirm email and so on, no newsletters, you can't say I'm spamming people - I suck at follow ups) and while Gmail and other f

I send only transactional emails (confirm email and so on, no newsletters, you can't say I'm spamming people - I suck at follow ups) and while Gmail and other free email providers work just fine, it's the institutions where you start with negative reputation it seems and have to work to earn the right to send email to users who asked for it