This has been happening for a while and I now have a customer who wants proof of an email statement being sent, but I cannot prove it because it is missing from the email saved. How do I get a copy of the original email sent with the attachment. We have the cloud version.
See this guide SMTP server | Manager.io
in particular Send a copy of every email to this address and SendCopyEmail
I send a copy to a specially set up gmail account just for that purpose.