CTI_JianJie Lv2Posted 10 Apr 2023 11:19
  
Hi, Sangfor application identification database might not recognize all the email vendor signatures, especially the web-based email vendor.
You can try to allow all in the access control policy, then create another content security policy that rejected all URL categories, but allowed the email URL category.
That is much easy and workable compared to block by ports or the application identification.

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