Email Source: Fiserv, Inc.

Homepage: https://www.fiserv.com/

DMARC Capabilities

Capable of generating DMARC compliant email for others

Yes

Fiserv appears to be able to use customer domains in the SMTP envelope, which would allow for SPF to relevant in a DMARC context.

Capable of signing email with DKIM for others

Yes

There's data that Fiserv partially supports DMARC compliance via DKIM either for a very limited number of clients or for a very small part of its infrastructure. Contact Fiserv to understand more.

Capable of sending SPF compliant email for others

Yes

If you add 'include:fiserv.com' to your SPF, you'll authorize a list of servers that's too large and pulls in 4 additional DNS lookups. Instead, you could ask Fiserv to provide a specific list of IPs to authorize only the servers which you use.