Advanced processing of electronic messages with attachments in a cybersecurity system

A system for managing computer security risks associated with message file attachments in a cybersecurity network, the system comprising:

• a client computing device comprising:
• a processing device,
• a user interface,
• a messaging client configured to cause the client computing device to receive electronic messages and present the electronic messages to a user on a display device,
• a computer-readable medium portion storing programming instructions that are configured to cause the client computing device to:
• receive an electronic message at the messaging client;
• receive, via the user interface, an indication that a user has attempted to actuate an attachment to the electronic message that the messaging client has received;
• and
• prevent the attachment from actuating on the client computing device until the system determines whether the received message is a legitimate message or a potentially malicious message;
• and
• a computer-readable medium portion storing programming instructions that are configured to cause the client computing device or a remote computing device to:
• determine whether the received message is a legitimate message or a potentially malicious message without processing the attachment,
• if the determining determines that the received message is a legitimate message, permit the attachment to actuate on the client computing device, and
• if the determining determines that the received message is not or may not be a legitimate message, continue preventing the attachment from actuating on the client computing device.