Information on how to configure SPF and DKIM for vendors like Sendgrid, Mailchimp, Office365 etc. DKIM configuration for AmazonSES DKIM configuration for Office 365 cloud DKIM configuration for Salesforce cloud
DKIM configuration for MailChimp
To help ensure your emails reach your recipients’ inboxes, set up custom DomainKeys Identified Mail (DKIM) authentication for your domain. Inbox Service Providers (ISPs) like Google, Yahoo, and Microsoft use