Hey, when we send to hotmail so we meet once in a while the error "Lost connection" in the mail log, but it comes only a few times in a day otherwise they become too late, but it is because that in the period sent the quick or is it Just an error connection between us and hotmail which one should not think more about?

Mar 4 13:29:10 emailserver21 postfix/smtp[1337]: 2373F574C4: to=<xxx1@hotmail.com>, relay=mx4.hotmail.com[65.54.188.110]:25, delay=1706, delays=1704/0.41/1.1/0.42, dsn=2.0.0, status=sent (250 <abf26db30b6ae291c28e880abac36dac@localhost.localdomain> Queued mail for delivery)
Mar 4 13:29:49 emailserver21 postfix/error[1690]: A550962BA3: to=<xxx2@hotmail.com>, relay=none, delay=1783, delays=1757/26/0/0.33, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mx2.hotmail.com[65.54.188.72] while sending RCPT TO)
Mar 4 13:40:51 emailserver21 postfix/error[2117]: A550962BA3: to=<xxx3@hotmail.com>, relay=none, delay=2444, delays=2373/71/0/0.46, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mx1.hotmail.com[65.55.92.184] while sending RCPT TO)
Mar 4 13:44:35 emailserver21 postfix/smtp[2020]: 16B965708A: to=<xxx4@live.se>, relay=mx2.hotmail.com[65.54.188.110]:25, delay=123, delays=121/0.03/0.67/0.68, dsn=2.0.0, status=sent (250 <a3f0741dd980650e8c7a89a02fd75a13@localhost.localdomain> Queued mail for delivery)
Mar 4 13:50:04 emailserver21 postfix/error[2813]: A550962BA3: to=<xxx5@hotmail.com>, relay=none, delay=2998, delays=2948/50/0/0.24, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mx2.hotmail.com[65.55.37.72] while sending RCPT TO)