exchange not block mail from sender not-exist :

Copper Contributor
 
I have third-party applications like GLPI, exchange accepts emails from non-existent mailboxes, is there a possibility at the reception connector level to block or verify the email sender? (not accept emails from emais adresse no-existent)

 

for exemple when i run this cmd with powershell:

 

send-mailmessage -from 'email Adresse not exist' -to 'user emails adresse in my domaine' -subject 'test' --smtpserver '@ip my server exchange'

 

the email is received in the inbox mail of mailbox user emails, 

 

any help ?

1 Reply
I don't believe this is possible. Email systems weren't originally designed to check that the sender email address is a real person (how would one email system check that a sender in another system is a real person?). It's only now that things like SPF, DKIM etc try to establish whether the sender is legitimate, but they don't actually check that the sender email address is a real person and exists. There are plenty of valid scenarios where the sender address actually doesn't exist in the sender environment.