for a e commerce tool we have coded an automatic email delivery.

 

but for customers with a outlook.com/.de the mails from the server are blocked

 

error code:

 

 

Oct 15 07:50:05 v22014052219018655 postfix/smtp[2467]: 73F4311ED1E: to=<keytest@outlook.de>, relay=mx4.hotmail.com[65.54.188.126]:25, delay=1.4, delays=0.04/0.02/0.49/0.85, dsn=2.0.0, status=sent (250 <3d1cb10e06528242149d7c7c84d099c4@swift.generated> Queued mail for delivery)

 

Does somebody has any idea

 

thanks flo

Test one of your emails here: https://www.mail-tester.com/

About the error “Queued mail for delivery”, is it a bounce back by email or any log file?