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SmarterMail 14.1.5675 / Windows 2012 Server
Created a mailing list with two email addresses. Send message to list from email address 1, list broadcasts back to address 1 and 2.
Reply to first message using email address 1. To address is the list address, as configured. Message is never broadcast out to either address 1 or 2.
Checked Delivery log; for the time period of the missing message, the log reads:
[2015.08.07] 15:46:22  Delivery started for [SENDER_ADDRESS] at 3:46:22 PM
[2015.08.07] 15:46:32  Skipping spam checks: User authenticated
[2015.08.07] 15:46:37  Starting local delivery to [LIST_ADDRESS]
[2015.08.07] 15:46:37  Processing Mailing List: [LIST_ADDRESS]
[2015.08.07] 15:46:38  Delivery for [SENDER_ADDRESS] to [LIST_ADDRESS] has completed (Delivered)
[2015.08.07] 15:46:38  Exception: Length cannot be less than zero.
[2015.08.07] 15:46:38  Delivery finished for [SENDER_ADDRESS] at 3:46:38 PM [id:-887530573433]
This could explain why i've had some clients complain that some of their list messages go missing/never received by the group. Help!