可以发邮件，但是不能接收外网的邮件，请问版主如何解决，下面是邮件的日志。
Aug 13 11:47:12 postfix postfix/qmgr[20369]: B03D2C8805C: removed
Aug 13 11:50:18 postfix postfix/anvil[3292]: statistics: max connection rate 1/60s for (smtp:210.72.232.129) at Aug 13 11:45:21
Aug 13 11:50:18 postfix postfix/anvil[3292]: statistics: max connection count 1 for (smtp:210.72.232.129) at Aug 13 11:45:21
Aug 13 11:50:18 postfix postfix/anvil[3292]: statistics: max cache size 1 at Aug 13 11:45:21
Aug 13 12:01:01 postfix policyd-cleanup: clean up process starting: policyd v1.82
Aug 13 12:01:01 postfix policyd-cleanup: connecting to mysql database: 127.0.0.1
Aug 13 12:01:01 postfix policyd-cleanup: connected..
Aug 13 12:01:01 postfix policyd-cleanup: expiring throttlesender records older than 31 days (1247457661)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: expiring throttlesender instances older than 1 hour (1250132461)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: clean up process starting: policyd v1.82
Aug 13 12:01:01 postfix policyd-cleanup: connecting to mysql database: 127.0.0.1
Aug 13 12:01:01 postfix policyd-cleanup: connected..
Aug 13 12:01:01 postfix policyd-cleanup: expiring validated records older than 7 days (1249531261)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: expiring unvalidated records older than 2 days (1249963261)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: expiring blacklisted records (1250136061)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: expiring autowhitelisted records older than 7 days (1250136061)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: expiring helo records older than 7 days (1250136061)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records
Aug 13 12:01:01 postfix policyd-cleanup: expiring throttlerecipient records older than 31 days (1247457661)
Aug 13 12:01:01 postfix policyd-cleanup: expired: 0 records