anyone familiar with 1and1's email setting?

[William C]

Hallo,

I tried to add SPF on 1and1 domain, got the help page:
https://www.ionos.com/help/domains/configuring-mail-servers-and-other-related-records/using-an-spf-record-to-prevent-spam/

It doesn't state clearly what are their official SPF records, but give 
an example:

v=spf1 include:_spf.perfora.net include:_spf.kundenserver.de ~all

Do you know what's their exact SPF records? and how to setup DKIM on 
their hosting DNS?

Thanks & happy new year

regards.