Detecting and preventing transmission of spam messages using modified source numbers

A method, comprising:

• at a computing platform comprising at least one processor, a communication interface, and memory:
• receiving, by the at least one processor, from a recipient device different from the computing platform and communicatively coupled to the computing platform via a communication network, information indicating that the recipient device has generated of an outbound character-limited message for transmission;
• determining that the outbound character-limited message corresponds to a reply to a first character-limited message received by the recipient device from a sender, wherein the first character-limited message has been determined to include suspicious content;
• based on determining that the outbound character-limited message corresponds to the reply to the first character-limited message that includes suspicious content, preventing transmission of the outbound character-limited message toward the sender;
• generating, by the at least one processor, a modified character-limited message by modifying a source number associated with the recipient device for the outbound character-limited message;
• causing transmission, by the at least one processor, of the modified character-limited message to the sender in place of the outbound character-limited message;
• intercepting, by the at least one processor, a second character-limited message sent by the sender in response to the modified character-limited message and directed to the modified source number;
• and
• redirecting, by the at least one processor, the second character-limited message away from the recipient device.

One or more non-transitory computer-readable media storing instructions that, when executed by a computing platform comprising at least one processor, a communication interface, and memory, cause the computing platform to:

• receive, from a recipient device different from the computing platform and communicatively coupled to the computing platform via a communication network, information indicating that the recipient device has generated an outbound character-limited message for transmission;
• determine that the outbound character-limited message corresponds to a reply to a first character-limited message received by the recipient device from a sender, wherein the first character-limited message has been determined to include suspicious content;
• based on determining that the outbound character-limited message corresponds to the reply to the first character-limited message that includes suspicious content, prevent transmission of the outbound character-limited message toward the sender;
• generate a modified character-limited message by modifying a source number associated with the recipient device for the outbound character-limited message;
• cause transmission of the modified character-limited message to the sender in place of the outbound character-limited message;
• intercept a second character-limited message intended for the recipient device and sent by the sender in response to the modified character-limited message and directed to the modified source number;
• and
• redirect the second character-limited message away from the recipient device.