Dan Goodin writes that ASCII smuggling, a technique once primarily used to hide malicious prompt injections from Large Language Models (LLMs), has been adopted by spammers to evade email filters. By using invisible Unicode tags that mimic the structure of standard text, attackers can bypass machine learning-based spam detectors and natural language processing models without alerting human readers. This method allows words like "funding" or "credit" to be broken into non-standard tokens that escape keyword detection while remaining perfectly readable to a person once rendered in an email client.
- ASCII smuggling uses the Unicode Tags block, which contains 128 characters designed to be invisible to humans but readable by computers.
- Microsoft observed spam signatures using this technique spike from 21,000 per day to over 2.5 million within a four-day period in early February.
- The method is effective against modern AI-driven filters because it disrupts the way tokenizers process words into sub-word pieces.
- While originally used for stealthy prompt injections, spammers now use it specifically to obfuscate financial keywords from automated detectors.
- ASCII smuggling uses the Unicode Tags block, which contains 128 characters designed to be invisible to humans but readable by computers.
- Microsoft observed spam signatures using this technique spike from 21,000 per day to over 2.5 million within a four-day period in early February.
- The method is effective against modern AI-driven filters because it disrupts the way tokenizers process words into sub-word pieces.
- While originally used for stealthy prompt injections, spammers now use it specifically to obfuscate financial keywords from automated detectors.
The author details their attempt to set up a private mail server using Stalwart on an Ubuntu VPS. While the configuration of essential DNS records like SPF, DKIM, and DMARC was successful and the server avoided becoming an open relay, the project failed due to ISP restrictions blocking port 25. This meant that although outgoing emails could be sent, no incoming mail could ever reach the server. The article concludes that self-hosting email is complicated by external infrastructure factors beyond a user's control, making dedicated paid services often more practical for most people.
This document contains system prompt instructions for an AI model designed to function as a Gmail Assistant. It details specific protocols for managing email threads, including deciding between providing single or multiple reply options based on user input complexity. The instructions cover tone maintenance, strict prohibitions against hallucinating information not present in context, and precise formatting rules for greetings and sign-offs.
* Decision logic for generating one vs three replies
* Guidelines for maintaining professional email etiquette
* Constraints to prevent making up non-existent information
* Rules for extracting and listing action items from threads
* Decision logic for generating one vs three replies
* Guidelines for maintaining professional email etiquette
* Constraints to prevent making up non-existent information
* Rules for extracting and listing action items from threads
>"Using DSPy to automatically create, evaluate, and optimize your prompts"
Manual prompt engineering is often slow and unreliable due to unpredictable inputs. DSPy addresses this by treating prompt development like traditional ML training. It automatically generates, evaluates (using "LLM-as-a-judge"), and optimizes prompts based on high-level task descriptions, providing a faster, more systematic way to build robust LLM applications.
Manual prompt engineering is often slow and unreliable due to unpredictable inputs. DSPy addresses this by treating prompt development like traditional ML training. It automatically generates, evaluates (using "LLM-as-a-judge"), and optimizes prompts based on high-level task descriptions, providing a faster, more systematic way to build robust LLM applications.
This document defines the "cid:" and "mid:" URL schemes for referencing messages and their parts. The "cid:" scheme is used within multipart messages, like emails, to reference embedded content such as images. The "mid:" scheme allows referencing entire messages or specific parts within them using their Message-ID and Content-ID. It details the syntax for these URLs, emphasizing the importance of unique Content-IDs and the handling of encoded characters. The specification requires implementations to support the full "mid" URL form (message-id/content-id) for interoperability.
Turn incoming emails into reliable webhooks in minutes. Replace brittle IMAP scripts and Zapier hacks. Route support tickets, orders, or alerts from any mailbox into clean JSON your services can consume.
Documentation and downloads for Proxmox Mail Gateway, including admin guides for versions 9.x, 8.x, and 7.x, as well as a datasheet.
Proxmox Mail Gateway is an open-source email security appliance designed to protect self-hosted email servers from spam, malware, and other threats. It functions as a firewall with IDS/IDP features, utilizing ClamAV, SpamAssassin, and Postfix.
A Landel Mailbug email appliance was repurposed into an AI console using an ESP32 microcontroller, text-to-speech, and the ChatGPT API.
Anurag Singh details seven small Python scripts designed to automate common tasks and improve productivity on both Mac and Windows machines:
**Script Name** | **Purpose** | **Key Features/Notes** |
|---|---|---|
| **Inbox Cleaner** | Cleans email inbox | Archives or deletes emails older than a specified number of days. Works with IMAP, compatible with most email providers. |
| **S3 Backup** | Backs up files to cloud storage | Uploads files to an S3-compatible storage provider. Minimalist, suitable for daily/weekly backups. |
| **Screenshot Sorter** | Organizes screenshots | Finds screenshots, sorts them by date into a tidy folder structure. Includes a dry-run mode. |
| **Bulk Rename** | Renames multiple files | Renames files using patterns or sequentially. Uses regular expressions for advanced renaming. |
| **Arrange It** | Organizes files into folders | Moves files into categorized folders based on their extension (Images, Docs, Spreadsheets, etc.). |
| **Clipboard Save** | Saves clipboard history | Saves every new clipboard item to a daily text file. Creates a personal history of copied text. |
**Script Name** | **Purpose** | **Key Features/Notes** |
|---|---|---|
| **Inbox Cleaner** | Cleans email inbox | Archives or deletes emails older than a specified number of days. Works with IMAP, compatible with most email providers. |
| **S3 Backup** | Backs up files to cloud storage | Uploads files to an S3-compatible storage provider. Minimalist, suitable for daily/weekly backups. |
| **Screenshot Sorter** | Organizes screenshots | Finds screenshots, sorts them by date into a tidy folder structure. Includes a dry-run mode. |
| **Bulk Rename** | Renames multiple files | Renames files using patterns or sequentially. Uses regular expressions for advanced renaming. |
| **Arrange It** | Organizes files into folders | Moves files into categorized folders based on their extension (Images, Docs, Spreadsheets, etc.). |
| **Clipboard Save** | Saves clipboard history | Saves every new clipboard item to a daily text file. Creates a personal history of copied text. |
