When using Symantec Encryption Desktop (formerly PGP Desktop) you may be unable to send/receive emails through PGP when Kaspersky antivirus is running
3 Antivirus modules from Kaspersky (E-Mail Protection, Web Protection and Banner Protection) are blocking access from PGP to remote mail server (in this case PGP reports to mail client that access to email is denied). Therefore if one of above modules is active the email cannot be proxied through PGP.
In order to restore mail flow please create an exception in Kaspersky Anti-Virus 6.0 R2 for Windows Workstations, following steps below:
With PGPTray.exe in "Trusted zone" email will be send and delivered without a problem.
Alternatively you may update antivirus software as the Kaspersky Endpoint Security 10 for Windows (for workstations) is not affected by this problem. According to http://support.kaspersky.com/10930 Kaspersky Anti-Virus 6.0 R2 for Windows Workstations (126.96.36.1991 Maintenance Pack 4 Critical Fix 2) is fully supported until October 31, 2014. rom November 1, 2014 to December 31, 2015, Kaspersky Anti-Virus 6.0 R2 for Windows Workstations (188.8.131.521 Maintenance Pack 4 Critical Fix 2) will have the Limited support status.
Symantec Encryption Desktop 10.3.x
PGP Desktop 10.2.x
Microsoft Windows Family Operating System
Kaspersky Anti-Virus 6.0 R2 for Windows Workstations