We have recently started using Office 365 for our email, which requires us to add a DNS TXT record with the value
v=spf1 include:spf.protection.outlook.com -all. We already have an
SPF record with the value
v=spf1 include:spf.mandrillapp.com ?all for Mandrill, an SMTP sender we also use.
My concern is this might cause some conflict. Is my concern valid or will be be fine with these two SPF records?