Failure sending mail: An attempt was made to access a socket in a way forbidden by its access permissions


The communication between Bizagi and any e-mail server using SMTP uses the port number 25 due to internal Bizagi configurations. When a task or event sends an e-mail notification, it is important to validate if the required port is not being blocked by another application.

Applies to

Bizagi 10.x 


Emails are not sent and Bizagi throws an error indicating that there are no permissions over port 25.


There is one application blocking the port 25, usually an Antivirus or another security tool


Validate that neither your Antivirus System nor another application is blocking the port 25 necessary for e-mail delivery.