Forum Discussion
M365 (O365), MX etc and new email subdomain for Hubspot and other 3rd-party mail senders
Hi My small business has been using M365 (aka O365) for years. With the addition of various third party email senders (like xero.com, hubspot.com, gsuite), our SPF record has become too long. ...
You should be able to configure a different reply-to address for those emails. Or, you can add the email.domain.com subdomain to your tenant, then configure the MX record to point to O365 and the SPF record as needed. Don't forget to also add user@email.domain.com aliases to any user/mailbox that needs to receive such messages.