I am unable to send the mail on rt and recieve through mail and log is below

Aug 27 13:23:19 support fetchmail[15172]: 1 message for techsupport@de-cix.in at 180.149.241.244 (1572686 octets).
Aug 27 13:24:02 support fetchmail[15172]: reading message techsupport@de-cix.in@180.149.241.244:1 of 1 (1572686 octets) (log message incomplete)
Aug 27 13:24:02 support fetchmail[15172]: MDA returned nonzero status 75
Aug 27 13:24:02 support fetchmail[15172]: not flushed

Hey,

A bit more information is required. Are submitting that email to RT?