Capable of generating DMARC compliant email for others? yes
Capable of signing email with DKIM for others? yes
Capable of sending SPF compliant email for others? yes
Notes on Capabilities
DMARC: Entelo supports full DMARC compliance.
DKIM: Contact Entelo support for DKIM setup. More information can be found here: https://entelo.zendesk.com/hc/en-us/articles/206771293-Configuring-DNS-to-improve-Track-email-deliverability
SPF: Entelo runs on SendGrid and supports DMARC compliance via SPF. Note that if you're asked to add SendGrid's general 'include' statement to your SPF, that will pull in way more than what you need in your DNS. Instead, Entelo could provide you with a list of dedicated IPs they're using to send through SendGrid, which you could then add as 'ip4:x.x.x.x' statements to your SPF.
When deploying DMARC, domain owners often find new sources of email.
Domain owners then wonder if the source is capable of sending DMARC compliant email.
This directory contains information on the capabilities of various sources of email.