I manage a few shared hosting accounts for some customers in different hosting providers. One of the IPs of those accounts was blacklisted and my customer hasn't been able to send emails to Google accounts for a few days.
A removal request was already submitted but I would like to allow the user to temporarily send emails using another SMTP server (probably in one of my reseller accounts) but still get the emails in this account (IMAP).
Is this possible? Can I have two MX entries and receive the emails in both of them?