diff --git a/etc/venice-config.xml b/etc/venice-config.xml
index fb14b57..e163e8e 100644
--- a/etc/venice-config.xml
+++ b/etc/venice-config.xml
@@ -485,6 +485,55 @@ click the "Manage" button, and click the "Stop Subscribing To This Topic" link.
     <!-- Parameters: message.poster, topic.name, topic.locator, conference.name, community.name -->
     <subj-mail-post>New Post in ${topic.name}</subj-mail-post>
 
+    <!-- Mass mail notification reminder for communities -->
+    <!-- Parameters: community.name -->
+    <mass-community-notice><![CDATA[
+You are receiving this message because you are a member of the Venice community "${community.name}".
+The sender is a host of this community.  To stop receiving mass E-mailed notices from all
+Venice community and conference hosts, visit Venice, click on the "Profile" link, check the box labeled
+"Don't send me mass E-mail from community/conference hosts," and click Update to save this preference.
+    ]]></mass-community-notice>
+
+    <!-- Mass mail notification reminder for conference posters -->
+    <!-- Parameters: community.name, conference.name -->
+    <mass-conference-notice-poster><![CDATA[
+You are receiving this message because you are a participant in the "${conference.name}" conference
+in the Venice community "${community.name}".  The sender is a host of this conference.  To stop receiving
+mass E-mailed notices from all Venice community and conference hosts, visit Venice, click on the "Profile"
+link, check the box labeled "Don't send me mass E-mail from community/conference hosts," and click Update
+to save this preference.
+    ]]></mass-conference-notice-poster>
+
+    <!-- Mass mail notification reminder for conference readers -->
+    <!-- Parameters: community.name, conference.name -->
+    <mass-conference-notice-reader><![CDATA[
+You are receiving this message because you are a reader of the "${conference.name}" conference
+in the Venice community "${community.name}".  The sender is a host of this conference.  To stop receiving
+mass E-mailed notices from all Venice community and conference hosts, visit Venice, click on the "Profile"
+link, check the box labeled "Don't send me mass E-mail from community/conference hosts," and click Update
+to save this preference.
+    ]]></mass-conference-notice-reader>
+
+    <!-- Mass mail notification reminder for topic posters -->
+    <!-- Parameters: community.name, conference.name, topic.name -->
+    <mass-topic-notice-poster><![CDATA[
+You are receiving this message because you are a participant in the "${topic.name}" topic in the
+"${conference.name}" conference in the Venice community "${community.name}".  The sender is a host of the
+"${conference.name}" conference.  To stop receiving mass E-mailed notices from all Venice community and
+conference hosts, visit Venice, click on the "Profile" link, check the box labeled "Don't send me mass
+E-mail from community/conference hosts," and click Update to save this preference.
+    ]]></mass-topic-notice-poster>
+
+    <!-- Mass mail notification reminder for topic readers -->
+    <!-- Parameters: community.name, conference.name, topic.name -->
+    <mass-topic-notice-reader><![CDATA[
+You are receiving this message because you are a reader of the "${topic.name}" topic in the
+"${conference.name}" conference in the Venice community "${community.name}".  The sender is a host of the
+"${conference.name}" conference.  To stop receiving mass E-mailed notices from all Venice community and
+conference hosts, visit Venice, click on the "Profile" link, check the box labeled "Don't send me mass
+E-mail from community/conference hosts," and click Update to save this preference.
+    ]]></mass-topic-notice-reader>
+
   </messages>
 
 </venice-config>
diff --git a/src/com/silverwrist/util/OptionSet.java b/src/com/silverwrist/util/OptionSet.java
index f15bc56..baf76db 100644
--- a/src/com/silverwrist/util/OptionSet.java
+++ b/src/com/silverwrist/util/OptionSet.java
@@ -257,4 +257,17 @@ public class OptionSet extends BitSet
 
   } // end asString
 
+  /*--------------------------------------------------------------------------------
+   * External static operations
+   *--------------------------------------------------------------------------------
+   */
+
+  public static final char getOptionChar(int index)
+  {
+    if ((index<0) || (index>=ALPHA.length()))
+      throw new IndexOutOfBoundsException();
+    return ALPHA.charAt(index);
+
+  } // end getOptionChar
+
 } // end class OptionSet
diff --git a/src/com/silverwrist/venice/core/UserProperties.java b/src/com/silverwrist/venice/core/UserProperties.java
index 462db0c..8b63b3b 100644
--- a/src/com/silverwrist/venice/core/UserProperties.java
+++ b/src/com/silverwrist/venice/core/UserProperties.java
@@ -25,6 +25,7 @@ public class UserProperties
    */
 
   private boolean display_post_pictures;
+  private boolean mass_mail_opt_out;
 
   /*--------------------------------------------------------------------------------
    * Constructor
@@ -34,6 +35,7 @@ public class UserProperties
   public UserProperties()
   {
     display_post_pictures = false;
+    mass_mail_opt_out = false;
 
   } // end constructor
 
@@ -54,4 +56,16 @@ public class UserProperties
 
   } // end setDisplayPostPictures
 
+  public final boolean getMassMailOptOut()
+  {
+    return mass_mail_opt_out;
+
+  } // end getMassMailOptOut
+
+  public final void setMassMailOptOut(boolean b)
+  {
+    mass_mail_opt_out = b;
+
+  } // end setMassMailOptOut
+
 } // end class UserProperties
diff --git a/src/com/silverwrist/venice/core/impl/AdminUserContextImpl.java b/src/com/silverwrist/venice/core/impl/AdminUserContextImpl.java
index 3bf6200..1d5daa0 100644
--- a/src/com/silverwrist/venice/core/impl/AdminUserContextImpl.java
+++ b/src/com/silverwrist/venice/core/impl/AdminUserContextImpl.java
@@ -144,6 +144,7 @@ class AdminUserContextImpl implements AdminUserContext
     AdminUserProperties rc = new AdminUserProperties();
     rc.setDisplayPostPictures(flags.get(UserContextImpl.BF_POSTPICTURES));
     rc.setDisallowPhoto(flags.get(UserContextImpl.BF_ADM_NOPHOTO));
+    rc.setMassMailOptOut(flags.get(UserContextImpl.BF_MASSMAIL_OPTOUT));
     return rc;
 
   } // end createProperties
@@ -156,6 +157,8 @@ class AdminUserContextImpl implements AdminUserContext
       rc.set(UserContextImpl.PROP_FLAGS);
     if (flags.assign(UserContextImpl.BF_ADM_NOPHOTO,props.getDisallowPhoto()))
       rc.set(UserContextImpl.PROP_FLAGS);
+    if (flags.assign(UserContextImpl.BF_MASSMAIL_OPTOUT,props.getMassMailOptOut()))
+      rc.set(UserContextImpl.PROP_FLAGS);
 
     return rc;
 
diff --git a/src/com/silverwrist/venice/core/impl/CommunityCoreData.java b/src/com/silverwrist/venice/core/impl/CommunityCoreData.java
index b1e4fbf..c2ef691 100644
--- a/src/com/silverwrist/venice/core/impl/CommunityCoreData.java
+++ b/src/com/silverwrist/venice/core/impl/CommunityCoreData.java
@@ -1838,9 +1838,11 @@ class CommunityCoreData implements CommunityData, CommunityDataBackend
 
       // create the SQL statement
       StringBuffer sql =
-	  new StringBuffer("SELECT c.email FROM contacts c, users u, sigmember m "
+	  new StringBuffer("SELECT c.email FROM contacts c, users u, sigmember m, propuser p "
 			   + "WHERE c.contactid = u.contactid AND u.uid = m.uid AND m.sigid = ");
-      sql.append(cid).append(" AND u.is_anon = 0;");
+      sql.append(cid).append(" AND u.is_anon = 0 AND p.uid = u.uid AND p.ndx = ");
+      sql.append(UserContextImpl.PROP_FLAGS).append(" AND p.data NOT LIKE '%");
+      sql.append(OptionSet.getOptionChar(UserContextImpl.BF_MASSMAIL_OPTOUT)).append("%';");
       if (logger.isDebugEnabled())
 	logger.debug("SQL: " + sql.toString());
 
diff --git a/src/com/silverwrist/venice/core/impl/CommunityUserContextImpl.java b/src/com/silverwrist/venice/core/impl/CommunityUserContextImpl.java
index 8bd397d..ed7f29a 100644
--- a/src/com/silverwrist/venice/core/impl/CommunityUserContextImpl.java
+++ b/src/com/silverwrist/venice/core/impl/CommunityUserContextImpl.java
@@ -1378,9 +1378,16 @@ class CommunityUserContextImpl implements CommunityContext, CommunityBackend
     // get the mailing list
     List mail_list = getData().getMassMailList();
     if (mail_list.size()>0)
-    { // send the mail in the background!
+    { // prepare the E-mail message text; append the disKlaimer at the end
+      HashMap vars = new HashMap();
+      vars.put("community.name",env.getCommunityName());
+      String disklaimer = env.getStockMessage("mass-community-notice");
+      StringBuffer buf = new StringBuffer(text);
+      buf.append("\n\n").append(StringUtil.replaceAllVariables(disklaimer,vars));
+
+      // send the mail in the background!
       MailerAgent agent = new MailerAgent(env,env.getUser().realUserName(),env.getUser().realEmailAddress(),
-					  mail_list,subject,text);
+					  mail_list,subject,buf.toString());
       agent.start();
 
     } // end if
diff --git a/src/com/silverwrist/venice/core/impl/ConferenceUserContextImpl.java b/src/com/silverwrist/venice/core/impl/ConferenceUserContextImpl.java
index 18b2b76..d25a082 100644
--- a/src/com/silverwrist/venice/core/impl/ConferenceUserContextImpl.java
+++ b/src/com/silverwrist/venice/core/impl/ConferenceUserContextImpl.java
@@ -1528,8 +1528,11 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 	sql.append("s.last_post");
       else
 	sql.append("s.last_read");
-      sql.append(" FROM contacts c, users u, confsettings s WHERE c.contactid = u.contactid "
-		 + "AND u.uid = s.uid AND s.confid = ").append(confid).append(" AND u.is_anon = 0 AND ");
+      sql.append(" FROM contacts c, users u, confsettings s, propuser p WHERE c.contactid = u.contactid "
+		 + "AND u.uid = s.uid AND s.confid = ").append(confid);
+      sql.append(" AND u.is_anon = 0 AND u.uid = p.uid AND p.ndx = ").append(UserContextImpl.PROP_FLAGS);
+      sql.append(" AND p.data NOT LIKE '%");
+      sql.append(OptionSet.getOptionChar(UserContextImpl.BF_MASSMAIL_OPTOUT)).append("%' AND ");
       if (posters)
 	sql.append("ISNULL(s.last_post) = 0 ORDER BY s.last_post DESC;");
       else
@@ -1570,9 +1573,18 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
     } // end finally
 
     if (rc.size()>0)
-    { // send the actual E-mail messages in the background
+    { // prepare the E-mail message text; append the disKlaimer at the end
+      HashMap vars = new HashMap();
+      vars.put("community.name",env.getCommunityName());
+      vars.put("conference.name",env.getConferenceName());
+      String disklaimer =
+	  env.getStockMessage(posters ? "mass-conference-notice-poster" : "mass-conference-notice-reader");
+      StringBuffer buf = new StringBuffer(text);
+      buf.append("\n\n").append(StringUtil.replaceAllVariables(disklaimer,vars));
+
+      // send the actual E-mail messages in the background
       MailerAgent agent = new MailerAgent(env,env.getUser().realUserName(),env.getUser().realEmailAddress(),
-					  rc,subject,text);
+					  rc,subject,buf.toString());
       agent.start();
 
     } // end if
diff --git a/src/com/silverwrist/venice/core/impl/TopicUserContextImpl.java b/src/com/silverwrist/venice/core/impl/TopicUserContextImpl.java
index 281dbf3..03cd169 100644
--- a/src/com/silverwrist/venice/core/impl/TopicUserContextImpl.java
+++ b/src/com/silverwrist/venice/core/impl/TopicUserContextImpl.java
@@ -20,6 +20,7 @@ package com.silverwrist.venice.core.impl;
 import java.sql.*;
 import java.util.*;
 import org.apache.log4j.*;
+import com.silverwrist.util.OptionSet;
 import com.silverwrist.util.StringUtil;
 import com.silverwrist.venice.core.*;
 import com.silverwrist.venice.core.internals.*;
@@ -1343,8 +1344,11 @@ class TopicUserContextImpl implements TopicContext
 	sql.append("s.last_post");
       else
 	sql.append("s.last_read");
-      sql.append(" FROM contacts c, users u, topicsettings s WHERE c.contactid = u.contactid "
-		 + "AND u.uid = s.uid AND s.topicid = ").append(topicid).append(" AND u.is_anon = 0 AND ");
+      sql.append(" FROM contacts c, users u, topicsettings s, propuser p WHERE c.contactid = u.contactid "
+		 + "AND u.uid = s.uid AND s.topicid = ").append(topicid);
+      sql.append(" AND u.is_anon = 0 AND u.uid = p.uid AND p.ndx = ").append(UserContextImpl.PROP_FLAGS);
+      sql.append(" AND p.data NOT LIKE '%");
+      sql.append(OptionSet.getOptionChar(UserContextImpl.BF_MASSMAIL_OPTOUT)).append("%' AND ");
       if (posters)
 	sql.append("ISNULL(s.last_post) = 0 ORDER BY s.last_post DESC;");
       else
@@ -1385,9 +1389,19 @@ class TopicUserContextImpl implements TopicContext
     } // end finally
 
     if (rc.size()>0)
-    { // send the actual E-mail messages in the background
+    { // prepare the E-mail message text; append the disKlaimer at the end
+      HashMap vars = new HashMap();
+      vars.put("community.name",env.getCommunityName());
+      vars.put("conference.name",env.getConferenceName());
+      vars.put("topic.name",name);
+      String disklaimer =
+	  env.getStockMessage(posters ? "mass-topic-notice-poster" : "mass-topic-notice-reader");
+      StringBuffer buf = new StringBuffer(text);
+      buf.append("\n\n").append(StringUtil.replaceAllVariables(disklaimer,vars));
+      
+      // send the actual E-mail messages in the background
       MailerAgent agent = new MailerAgent(env,env.getUser().realUserName(),env.getUser().realEmailAddress(),
-					  rc,subject,text);
+					  rc,subject,buf.toString());
       agent.start();
 
     } // end if
diff --git a/src/com/silverwrist/venice/core/impl/UserContextImpl.java b/src/com/silverwrist/venice/core/impl/UserContextImpl.java
index df998ea..0ae9b4d 100644
--- a/src/com/silverwrist/venice/core/impl/UserContextImpl.java
+++ b/src/com/silverwrist/venice/core/impl/UserContextImpl.java
@@ -43,6 +43,7 @@ class UserContextImpl implements UserContext, UserBackend
   // Boolean flag indexes
   static final int BF_POSTPICTURES = 0;
   static final int BF_ADM_NOPHOTO = 1;
+  static final int BF_MASSMAIL_OPTOUT = 2;
 
   private static Category logger = Category.getInstance(UserContextImpl.class);
 
@@ -311,6 +312,7 @@ class UserContextImpl implements UserContext, UserBackend
   {
     UserProperties rc = new UserProperties();
     rc.setDisplayPostPictures(flags.get(BF_POSTPICTURES));
+    rc.setMassMailOptOut(flags.get(BF_MASSMAIL_OPTOUT));
     return rc;
 
   } // end createProperties
@@ -321,6 +323,8 @@ class UserContextImpl implements UserContext, UserBackend
 
     if (flags.assign(BF_POSTPICTURES,props.getDisplayPostPictures()))
       rc.set(PROP_FLAGS);
+    if (flags.assign(BF_MASSMAIL_OPTOUT,props.getMassMailOptOut()))
+      rc.set(PROP_FLAGS);
 
     return rc;
 
diff --git a/src/com/silverwrist/venice/servlets/format/AdminModifyUserDialog.java b/src/com/silverwrist/venice/servlets/format/AdminModifyUserDialog.java
index 6c5fcd3..0f8067e 100644
--- a/src/com/silverwrist/venice/servlets/format/AdminModifyUserDialog.java
+++ b/src/com/silverwrist/venice/servlets/format/AdminModifyUserDialog.java
@@ -148,6 +148,9 @@ public class AdminModifyUserDialog extends ContentDialog
     addFormField(new CDFormCategoryHeader("User Preferences"));
     addFormField(new CDCheckBoxFormField("pic_in_post","Display user photos next to conference posts",
 					 "(where applicable)",YES));
+    addFormField(new CDCheckBoxFormField("no_mass_mail",
+                                         "Don't send user mass E-mail from community/conference hosts",
+                                          null,YES));
     addFormField(new CDLocaleListFormField("locale","Default locale","(for formatting dates/times)",true));
     addFormField(new CDTimeZoneListFormField("tz","Default time zone",null,true));
     addCommandButton(new CDImageButton("update","bn_update.gif","Update",80,24));
@@ -289,6 +292,8 @@ public class AdminModifyUserDialog extends ContentDialog
     photo_control.setLinkURL("adminuserphoto?uid=" + admuser.getUID());
     if (props.getDisplayPostPictures())
       setFieldValue("pic_in_post",YES);
+    if (props.getMassMailOptOut())
+      setFieldValue("no_mass_mail",YES);
     setFieldValue("locale",admuser.getLocale().toString());
     setFieldValue("tz",admuser.getTimeZone().getID());
 
@@ -348,6 +353,7 @@ public class AdminModifyUserDialog extends ContentDialog
     ci.setPrivateEmail(YES.equals(getFieldValue("pvt_email")));
     ci.setURL(getFieldValue("url"));
     props.setDisplayPostPictures(YES.equals(getFieldValue("pic_in_post")));
+    props.setMassMailOptOut(YES.equals(getFieldValue("no_mass_mail")));
 
     // Store the completed contact info.
     admuser.putContactInfo(ci);
diff --git a/src/com/silverwrist/venice/servlets/format/EditProfileDialog.java b/src/com/silverwrist/venice/servlets/format/EditProfileDialog.java
index ee3941a..e5e6b1c 100644
--- a/src/com/silverwrist/venice/servlets/format/EditProfileDialog.java
+++ b/src/com/silverwrist/venice/servlets/format/EditProfileDialog.java
@@ -141,6 +141,9 @@ public class EditProfileDialog extends ContentDialog
     addFormField(new CDFormCategoryHeader("User Preferences"));
     addFormField(new CDCheckBoxFormField("pic_in_post","Display user photos next to conference posts",
 					 "(where applicable)",YES));
+    addFormField(new CDCheckBoxFormField("no_mass_mail",
+                                         "Don't send me mass E-mail from community/conference hosts",
+                                          null,YES));
     addFormField(new CDLocaleListFormField("locale","Default locale","(for formatting dates/times)",true));
     addFormField(new CDTimeZoneListFormField("tz","Default time zone",null,true));
     addCommandButton(new CDImageButton("update","bn_update.gif","Update",80,24));
@@ -241,6 +244,8 @@ public class EditProfileDialog extends ContentDialog
     photo_control.setLinkURL("userphoto?tgt=" + URLEncoder.encode(target));
     if (props.getDisplayPostPictures())
       setFieldValue("pic_in_post",YES);
+    if (props.getMassMailOptOut())
+      setFieldValue("no_mass_mail",YES);
     setFieldValue("locale",uc.getLocale().toString());
     setFieldValue("tz",uc.getTimeZone().getID());
 
@@ -285,6 +290,7 @@ public class EditProfileDialog extends ContentDialog
 
     // Save off the properties.
     props.setDisplayPostPictures(YES.equals(getFieldValue("pic_in_post")));
+    props.setMassMailOptOut(YES.equals(getFieldValue("no_mass_mail")));
     uc.setProperties(props);
 
     // Save off the user's description and preferences.