Learning Penetration Testing with Python by Duffy Christopher

Learning Penetration Testing with Python by Duffy Christopher

Author:Duffy, Christopher
Language: eng
Format: epub, azw3
Publisher: Packt Publishing
Published: 2015-09-29T16:00:00+00:00


We did not get a hit for smith, but perhaps others will confirm during this attack. Before we write our script, you need to know the different error or control messages that can be produced in most SMTP systems. These can vary and you should design your script well enough to be modified for that environment.

Return code

Meaning

252

The username is on the system.

550

The username is not on the system.

503

The service requires authentication to use.

500

The service does not support VRFY.



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