Code:
Mar 12 15:47:41 oaxy postfix/qmgr[26022]: 9D732166CD9B: to=<room741@kaxy.com>, relay=none, delay=303788, status=deferred (delivery temporarily suspended: conversation with 127.0.0.1[127.0.0.1] timed out while sending end of data -- message may be sent more than once)
Mar 12 15:47:41 oaxy postfix/qmgr[26022]: 9E7FAA7426C: to=<curtisculkin@kaxy.com>, relay=none, delay=303750, status=deferred (delivery temporarily suspended: conversation with 127.0.0.1[127.0.0.1] timed out while sending end of data -- message may be sent more than once)
Mar 12 15:47:41 oaxy postfix/qmgr[26022]: 602261E6E1DF: to=<medicgamer@kaxy.com>, relay=none, delay=23860, status=deferred (delivery temporarily suspended: conversation with 127.0.0.1[127.0.0.1] timed out while sending end of data -- message may be sent more than once)
Mar 12 15:47:41 oaxy postfix/qmgr[26022]: 9019BA7463F: to=<skaggsbruce@kaxy.com>, relay=none, delay=303720, status=deferred (delivery temporarily suspended: conversation with 127.0.0.1[127.0.0.1] timed out while sending end of data -- message may be sent more than once)
This is what I get in my /var/log/mail.log

What is it?