A: Hey matthias94,
Any ESP (email service provider), including tinyEmail is not able to guarantee delivery rates but our platform is built to encourage best practices to have a high rate. Here are somethings we do to keep our platform healthy:

1. Authentication: tinyEmail uses email authentication protocols such as SPF, DKIM, and DMARC to prove to email providers that the emails sending are legitimate and not spam. https://help.tinyemail.com/en/articles/6027287-authenticate-your-sending-domain-using-dkim-dmarc-record

2. List hygiene: In tinyEmail this is called Audience; so it is audience health. Best practices are to not continually send to audience members who do not open and engage with your emails. This is why tinyEmail has segmentation features to find your openers and clickers: https://help.tinyemail.com/en/articles/5656723-understanding-your-audience-performance

3. Template optimization: tinyEmail provides a library of over 600 templates. All templates are built to optimize the layout and reduce the chances of being flagged as spam. This can involve avoiding certain keywords or phrases that are commonly associated with spam emails: https://help.tinyemail.com/en/articles/6639844-video-tutorial-how-to-pick-email-templates and we provide an AI tool help write highly effective subject lines: https://help.tinyemail.com/en/articles/6639844-video-tutorial-how-to-pick-email-templates

4. Deliverability monitoring: tinyEmail provides you delivery statistics and monitoring tools which you can use to track the delivery of emails and identify any issues that may be affecting deliverability. This can allow you to take corrective action quickly and minimize any negative impact on deliverability rates. https://help.tinyemail.com/en/articles/5543622-understand-your-campaign-analytics The tinyEmail team is quick to action these as it is important to us too.

5. I have not used the German free-email-provider tools you mentioned.

Let us know if you have any follow-up questions,

~
Tim