mailto links are unprotected
On the contact page, the website exposes the email as:
<a href="mailto:data@lsc-hubs.org">data@lsc-hubs.org</a>
This exposes the email to spam-crawlers that harvest the email address for spam purposes. The email has to be obfuscated.
Please check this blog for possible implementations: https://www.ionos.com/digitalguide/e-mail/e-mail-security/protecting-your-email-address-how-to-do-it/
Recommendation is to implement some JS encription, as spam crawlers have decoders for chars.
Email obfuscation is not bullet proof but it helps reducing the spam email.