Email Source: XS4ALL

Homepage: https://www.xs4all.nl/

This source is known to forward email

Capable of generating DMARC compliant email for others

Yes

XS4ALL hosts sites which are themselves capable of DMARC compliance. You may need to reach out to a domain's support contact for guidance, rather than to XS4ALL.

Capable of signing email with DKIM for others

Yes

Capable of sending SPF compliant email for others

Yes