My new European AWS SES alternative

I am currently in the process of migrating to a new mailserver setup that is integrated into my normal hosting setup on a new VPS at netcup. This time, the setup is based on the Docker images and configuration from a project called docker-mailserver (I previously used the other more popular docker-mailserver). It’s less monolithic and more flexible to adjust configuration etc. It also has a web UI to configure users, domains and aliases. On my old setup, I used the European AWS’s SES as relay to send mails to Outlook, iCloud, T-Online, and some other hosts that have unreasonable strict policies. I used AWS as it was the only provider I found that allowed an unlimited number of domains and is pay-as-you-go without tiers starting from 15 $ per month. But I was never that happy to use AWS in my European cloud setup, so I took another try and searched again. I found Cyso Cloud Transactional Mail Service which is based on the European Simple Mail Service. I signed up, configured all my…