Message blocked and solution

• Blind carbon copies or other implicit destinations are not allowed.
  Reason: This means that the address for the list was not found in the To: or CC: headers.
  Solution: To enable BCC addressing , go to "Privacy Options"–>"Spam-specific posting filters" –> "Must posts have list named in destination (to, cc) field (or be among the acceptable alias names, specified below)?" . This filed need to be "No".

• Too many recipients to the message.
  Reason: This happens hen number of recipients greater than its threshold (10 by default). It is a safeguard against malicious mails. Solution: To increase the range of default 10; go to "Privacy Options" –> "Spam-specific posting filters" and Change the "Ceiling on acceptable number of recipients for a posting"; then Submit Your Changes.

• Message body is too big.
  Reason: message is bigger that specified by the moderator or default. Solution:To change the limit go to "General Options" and change "Maximum length in Kb of a message body. Use 0 for no limit."

• Post by non-member to a members-only list.
  Reason: a non member of the list mailed to the list, and requires moderators approval. Solution: To turn these off Privacy Options –> "General posting filters"; then Restrict posting privilege to list members? to "No"

• Message has implicit destination.
  Reason: This means that mail which is bcc'ed to the list (or is sent to another list which has your list as a member) Solution: To turn these off Privacy Options –> "Spam-specific posting filters". Change the setting for "Must posts have list named in destination (to, cc) field to No and "Ceiling on acceptable number of recipients for a posting" to 0.

• Post to moderated list.
  Reason: This means that moderator has enabled moderation by default. Solution: To change this go to Privacy Options –> "General posting filters" –> "Must posts be approved by an administrator" –> NO.

• can not see list prefix for an email.
  Reason: Mailman is careful not to add a prefix when the header already has one, as is the case in replies. Solution: Check for mails which with prefix at beginning.

• When recipeint in CC and list member, the mail is delivered only once.
  Reason: Mailman new versions nodupes option to supress duplicate mails. Solution: disable "nodupes" option for that member in the membership management page.