Hi, I check my email on my phone. Once I see bounced messages coming through, I log in to mail in a box as administrator and disable my email address.
I found some interesting links:
1.) Create a sender policy framework (SPF) record for the IP addresses within your domain and enable authentication via SPF records for your own domain.
-You can check if you have an SPF here: https://mxtoolbox.com/spf.aspx
-The SPF record should typically look like this: “v=spf1 ip4:8.8.8.8 include:spf.spamhero.com ~all”
2.) Enable DKIM, publish a DKIM key and DKIM policy, and sign your messages with it.
How does email spoofing work? If you have noticed the actual configuration of the email account in your email contacts, you know that the outgoing server always contains SMTP also called the Simple Mail Transfer Protocol. All users use an SMTP when sending an email. However, this protocol can be exploited and is why not all spam smokes in the spam folder. However, the protocols for this were updated in 2008, but still do not contain any filters that can distinguish between original and manipulated headings.
https://community.mimecast.com/thread/2666
“If your spoofed user received an NDR, this would indicate that the sending server (the one that attempted to send the spoofed message) generated the NDR. Unfortunately there isn’t currently any way to keep the sending server from generating an NDR…add an option to Hold messages instead of rejecting them.”
How Spammers Spoof Your Email Address (and How to Protect Yourself)