multiple DKIM and SPF records


If mandrill use; and verify DKIM and SPF for that domain

It is also necessary to check in Mailwizz?

Because SPF records and DKIM are 2 different companies.
Also, if I use such "mailgum" or other provider, I must add your SPF and DKIM records.
All this can affect deliveries? problems exist ?, records are many records!