Question How to prevent one of my email to be used to spam

[LaurentR2D2]

Hello
One of my mail adresses on my serveur is used to spam. Its the first time I have this problem, but I have received more than 5000 non delivery report on this adress this morning, because someone is prentending to sens emails from this adress. This a copy or one of the delivery report :

Final-Recipient: rfc822; [email protected]
Original-Recipient: rfc822;[email protected]
Action: failed
Status: 5.1.1
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to reach does
not exist. Please try 550-5.1.1 double-checking the recipient's email
address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1
Fix bounced or rejected emails - Gmail Help p10si4124941wrf.152 - gsmtp

Luckily, it was an unused adress, so I have deleted it, but what can I do to prevent that ? Use spf records ?

Thank you

 

[mow]

SPF helps when the recipient's site uses it. Gmail does. In fact, if you want to sent mail to gmail, you should enable SPF and DKIM.