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Why are some of my subscribers receiving multiple messages?
Possible Reasons
  1. They are subscribed to the same list under more than one e-mail account.
  2. Their mail server (the computer which accepts mail from us) is improperly closing the network connection before giving us an acknowledgement that the message was received. In our logs, our mail server records that there is a possible duplicate because without acknowledgement, our mail server has no way of knowing whether the messages was successfully delivered.

What Should I Do?

Have the subscribers with problems notify their administrator that this is happening. They may need to contact their vendor for a fix. This problem is dependent on how their system communicates with the connecting system so they likely are not experiencing this problem with every message that is delivered to them. Further, some connecting systems may make more liberal assumptions about whether a message was delivered or not.

If the problem takes some time to resolve, you can always suggest that the subscriber use a free email account (e.g., Yahoo!) to receive list e-mail.


  BIGLIST Inc. · 212-686-2140
  PO Box 1655, Media, PA 19063
  NYC · Media

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