There are several mailing lists dealing with patterns.
Information about how to subscribe to each can be found below. 

This email address is being protected from spambots. You need JavaScript enabled to view it. is for presenting and describing software patterns.
This email address is being protected from spambots. You need JavaScript enabled to view it. is for presenting and describing business patterns.
This email address is being protected from spambots. You need JavaScript enabled to view it. concerns patterns on concurrency, distribution, and IPCs.
This email address is being protected from spambots. You need JavaScript enabled to view it. is about decoupling & complexity management.
This email address is being protected from spambots. You need JavaScript enabled to view it. is for discussion of patterns in general.
This email address is being protected from spambots. You need JavaScript enabled to view it. is about the design patterns in the Gang of Four's book.
This email address is being protected from spambots. You need JavaScript enabled to view it. is about the patterns described by the Siemens guys.
This email address is being protected from spambots. You need JavaScript enabled to view it. is for discussing patterns involving organizations.
This email address is being protected from spambots. You need JavaScript enabled to view it. is about patterns described in CORBA Design Patterns and related patterns.
This email address is being protected from spambots. You need JavaScript enabled to view it. is for discussion Power Builder patterns.
This email address is being protected from spambots. You need JavaScript enabled to view it. concerns antipattern refactoring and the book AntiPatterns.
This email address is being protected from spambots. You need JavaScript enabled to view it. is about patterns for software configuration management.
This email address is being protected from spambots. You need JavaScript enabled to view it. is about patterns for telecommunications

How to Subscribe to the Various Lists

If you have a browser that handles forms, there is a page for subscribing and unsubscribing directly.

This email address is being protected from spambots. You need JavaScript enabled to view it. is for presenting and describing software patterns. They don't have to be object-oriented or design patterns, though most of them are.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing the word subscribe in the Subject: field. Don't say "please subscribe me" or "I want to subscribe" or anything else. Just use the one word "subscribe". If you want a human to read your mail, type "Re: <something>" in the subject. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field. 

This email address is being protected from spambots. You need JavaScript enabled to view it. is for presenting and describing business patterns.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. Don't say "please subscribe me" or "I want to subscribe" or anything else. Just use the one word "subscribe". If you want a human to read your mail, type "Re: <something>" in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. is for presenting and creating patterns on concurrency, distribution, and IPCs.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. Don't say "please subscribe me" or "I want to subscribe" or anything else. Just use the one word "subscribe". If you want a human to read your mail, type "Re: <something>" in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. is for presenting and creating patterns about decoupling systems and managing complexity so that an architecture can be implemented in the context of organizational constraints. Of particular interest are:

• applications of "classic" patterns, like those in Design Patterns to the problem of designing an architecture to facilitate groups working together, and
• new patterns, perhaps combining GOF patterns, to achieve the same goal.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. Don't say "please subscribe me" or "I want to subscribe" or anything else. Just use the one word "subscribe". If you want a human to read your mail, type "Re: <something>" in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field. 

This email address is being protected from spambots. You need JavaScript enabled to view it. is for discussion of patterns in general, i.e., for discussing how to find patterns, how to organize them, or the meaning of patterns, but not necessarily about particular patterns.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. Don't say "please subscribe me" or "I want to subscribe" or anything else. Just use the one word "subscribe". If you want a human to read your mail, type "Re: <something>" in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field. 

This email address is being protected from spambots. You need JavaScript enabled to view it. is about the design patterns in the Gang of Four's book Design Patterns: Elements of Reusable Object-Oriented Software.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. Don't say "please subscribe me" or "I want to subscribe" or anything else. Just use the one word "subscribe". If you want a human to read your mail, type "Re: <something>" in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. is for reviewing and discussing the patterns described in the forthcoming book Pattern-Oriented Software-Architecture - A System of Patterns.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. For discussing patterns involving organizations, and the interaction between organization and architecture.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. For discussing patterns described in the book CORBA Design Patterns and related patterns. This email address is being protected from spambots. You need JavaScript enabled to view it. will also include presentation and discussion of Interface Definition Language (IDL) idioms from the Object Management Group's (OMG) IDL Metrics Working Group and new pattern languages sharing the same reference models (the book's Software Design Level Model and the OMG's Object Management Architecture).

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. For discussing Power Builder patterns.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. is a software development forum for the theory and practice of AntiPattern recognition and AntiPattern refactoring. AntiPatterns is a branch of design patterns research that documents negative solutions and their resolution through refactoring. Well known AntiPatterns include: Spagetti Code, Analysis Paralysis, and Stovepipe Systems. These and other AntiPatterns are documented in the book: W.J. Brown, H.W. McCormick, R.C. Malveau, and T.J. Mowbray, "ANTIPATTERNS: Refactoring Software, Architectures, and Projects in Crisis" , John Wiley & Sons, 1998. AntiPatterns research spans software design, software architecture, and software project issues, including both formal and informal refactoring techniques. The purpose of This email address is being protected from spambots. You need JavaScript enabled to view it. is to promote the general understanding of AntiPatterns and related extensions of design patterns research.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

This email address is being protected from spambots. You need JavaScript enabled to view it. is a list created for patterns of software configuration management.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.

telecomThis email address is being protected from spambots. You need JavaScript enabled to view it. is a list created for patterns of telecommunications systems.

To subscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word subscribe in the Subject: field. To unsubscribe, send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. containing a single word unsubscribe in the Subject: field.