Email messages are detected as malformed and shows the following log entry:
2019/09/20 13:49:35 GMT-05:00 [22655:3077465808] Encounter malformed message, fall into exception handling. (9) 'TMMSG_ERR_C_INT_MUCH_BYTES_IN_ENTITYHEADER'
In IMSS, by default the mail header size limitation is 65536 characters. The exception "TMMSG_ERR_C_INT_MUCH_BYTES_IN_ENTITYHEADER" indicates that the mail headers exceeded 65536 characters.
As a workaround follow these steps:
- Add the following key into "/opt/trend/imss/config/imss.ini, under the section [MessageModule]:
LimitBytesPerEntityHeader=16777216
The new limit will be 16MB.
- Use this command to restart:
/opt/trend/imss/script/S99IMSS restart