Kevin A. McGrail via mailop skrev den 2023-02-06 02:34:
To add onto this, rarely will you want to divine the IP addresses of
your service providers. Contact them for their include record. From
searching the interweb, it seems these are likely what you want:
_ _include:_spf.perfora.net include:_spf.kundenserver.de
include:spf.mailjet.com
If you really want the IPs, here you go:
https://www.ionos.com/help/email/postmaster/ip-addresses-of-the-11-ionos-mail-servers/
why not add +all aswell ? :)
i make abit funny of it since envelope sender changes on next hop
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