Abstract: One variation of a method includes, intercepting an email addressed to a target recipient within an organization, the email received from a sender at an inbound email address and including a first inbound display name; accessing a whitelist including a set of contact information corresponding to an entity associated with the organization and including a verified display name associated with the entity and a set of verified email addresses associated with the entity. The method further includes, in response to the set of verified email addresses omitting the inbound email address: characterizing a display name difference between the inbound display name and the verified display name associated with the entity; and, in response to the display name difference falling below a threshold difference, withholding transmission of the email to the target recipient and flagging the email for authentication.

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for verifying email senders includes: intercepting an email addressed to a target recipient within an organization, the email received from a sender at an inbound email address and including an inbound display name; accessing a whitelist including a verified display name and a set of verified email addresses corresponding to an employee within the organization; characterizing a display name difference between the inbound display name and the verified display name; in response to the display name difference falling below a threshold difference, comparing the inbound email address to the set of verified email addresses; in response to identifying the inbound email address in the set of verified email addresses, authorizing transmission of the email to the target recipient; and, in response to the set of verified email addresses omitting the inbound email address, withholding transmission of the email and flagging the email for authentication.

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for verifying email senders includes: intercepting an email addressed to a target recipient within an organization, the email received from a sender at an inbound email address and including an inbound display name; accessing a whitelist including a verified display name and a set of verified email addresses corresponding to an employee within the organization; characterizing a display name difference between the inbound display name and the verified display name; in response to the display name difference falling below a threshold difference, comparing the inbound email address to the set of verified email addresses; in response to identifying the inbound email address in the set of verified email addresses, authorizing transmission of the email to the target recipient; and, in response to the set of verified email addresses omitting the inbound email address, withholding transmission of the email and flagging the email for authentication.

Abstract: One variation of a method includes: intercepting an inbound email received from a sender at an inbound email address and addressed to a recipient within an organization; accessing a keyword list comprising a set of keywords associated with inauthentic email attempts; and, in response to identifying a first word, in a set of words contained in the inbound email, in the set of keywords, scanning the first inbound email for presence of external content linked to the first inbound email. In response to detecting a link to an external document within the first inbound email, the method further includes: accessing a whitelist comprising a set of verified email addresses associated with authentic email attempts within the organization; and, in response to the set of verified email addresses omitting the inbound email address, withholding transmission of the inbound email to the target recipient and flagging the inbound email for authentication.

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for verifying email senders includes: intercepting an email addressed to a target recipient within an organization, the email received from a sender at an inbound email address and including an inbound display name; accessing a whitelist including a verified display name and a set of verified email addresses corresponding to an employee within the organization; characterizing a display name difference between the inbound display name and the verified display name; in response to the display name difference falling below a threshold difference, comparing the inbound email address to the set of verified email addresses; in response to identifying the inbound email address in the set of verified email addresses, authorizing transmission of the email to the target recipient; and, in response to the set of verified email addresses omitting the inbound email address, withholding transmission of the email and flagging the email for authentication.

Abstract: One variation of a method for verifying email senders includes: intercepting an email addressed to a target recipient within an organization, the email received from a sender at an inbound email address and including an inbound display name; accessing a whitelist including a verified display name and a set of verified email addresses corresponding to an employee within the organization; characterizing a display name difference between the inbound display name and the verified display name; in response to the display name difference falling below a threshold difference, comparing the inbound email address to the set of verified email addresses; in response to identifying the inbound email address in the set of verified email addresses, authorizing transmission of the email to the target recipient; and, in response to the set of verified email addresses omitting the inbound email address, withholding transmission of the email and flagging the email for authentication.

Abstract: One variation of a method for verifying email senders includes: intercepting an email addressed to a target recipient within an organization, the email received from a sender at an inbound email address and including an inbound display name; accessing a whitelist including a verified display name and a set of verified email addresses corresponding to an employee within the organization; characterizing a display name difference between the inbound display name and the verified display name; in response to the display name difference falling below a threshold difference, comparing the inbound email address to the set of verified email addresses; in response to identifying the inbound email address in the set of verified email addresses, authorizing transmission of the email to the target recipient; and, in response to the set of verified email addresses omitting the inbound email address, withholding transmission of the email and flagging the email for authentication.

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification

Abstract: One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the !recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification