BizTalk Error: SMTP Adapter: Unknown Error Description

SYMPTOMS The error message in the event log as below: A message sent to adapter "SMTP" on send port "Orders_1.0.0.0.Orders.Email_DynamicSendPort_e369e0033a074fb3" with URI "mailto:xxx@xxx.xxx" is suspended. Error details: Unknown Error Description. RESOLUTION A known issue with the SMTP Adapter, especially with a dynamic port. Set a value to SMTP.EmailBodyTextCharset, you will work out the issue. Sample…

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