[ubuntu] postfix installation

May 10 11:48:32 ronald-desktop postfix/pickup[10406]: 9F8751C224A: uid=1000 from=
May 10 11:48:32 ronald-desktop postfix/cleanup[10463]: 9F8751C224A: message-id=
May 10 11:48:32 ronald-desktop postfix/qmgr[10407]: 9F8751C224A: from=, size=496, nrcpt=1 (queue active)
May 10 11:48:33 ronald-desktop postfix/smtp[10465]: 9F8751C224A: to=, relay=ASPMX.L.GOOGLE.com[2404:6800:4008:c01::1b]:25, delay=0.59, delays=0/0/0.44/0.15, dsn=5.1.2, status=bounced (host ASPMX.L.GOOGLE.com[2404:6800:4008:c01::1b] said: 553-5.1.2 The sender address is not a valid 553 5.1.2 RFC-5321 address. iu8si160359pac.78 - gsmtp (in reply to MAIL FROM command))
May 10 11:48:33 ronald-desktop postfix/cleanup[10463]: 608CF1C224B: message-id=
May 10 11:48:33 ronald-desktop postfix/bounce[10466]: 9F8751C224A: sender non-delivery notification: 608CF1C224B
May 10 11:48:33 ronald-desktop postfix/qmgr[10407]: 608CF1C224B: from=, size=2617, nrcpt=1 (queue active)
May 10 11:48:33 ronald-desktop postfix/qmgr[10407]: 9F8751C224A: removed
May 10 11:48:33 ronald-desktop postfix/error[10478]: 608CF1C224B: to=, relay=none, delay=0.01, delays=0/0/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: coect to home.xxxx.biz[60.xxx.143.133]:25: No route to host)