Problem postfix...

[santerref]

Hello, logwatch sends me the log by email... And in the postfix section there is many things that i do not understand and I want to know if there is risk or problem with these log (because there is ip from many country) :

Quote: --------------------- postfix Begin ------------------------



288925 bytes transferred
67 messages sent
67 messages removed from queue

Top ten local senders:
54 messages sent by:
webmaster@manager.h3berg.com (uid=2000):
8 messages sent by:
root (uid=0):


SASL Authentication failed from:
114-44-147-88.dynamic.hinet.net[114.44.147.88] : 40 Time(s)


Local Bounce:
To ovh@ks365184.kimsufi.com Msg="unknown user: "ovh"" : 4 Time(s)
To webmaster@manager.h3berg.com Msg="mail for manager.h3berg.com loops back to myself" : 2 Time(s)


Foreign Bounce:
To no-reply@h3berg.com Msg="unknown user: "no-reply@h3berg.com"" : 2 Time(s)


Too many errors in SMTP commands dialog:
After command AUTH:
114-44-147-88.dynamic.hinet.net[114.44.147.88] : 2 Time(s)


Connections lost:
Connection lost while CONNECT : 6 Time(s)
Connection lost while HELO : 2 Time(s)
Connection lost while RCPT : 14 Time(s)


Errors in HELO/EHLO conversation:
Helo command rejected: need fully-qualified hostname:
114-44-40-179.dynamic.hinet.net[114.44.40.179] : 2 Time(s)
118-165-90-59.dynamic.hinet.net[118.165.90.59] : 2 Time(s)
118-167-128-232.dynamic.hinet.net[118.167.128.232] : 2 Time(s)
118-167-131-211.dynamic.hinet.net[118.167.131.211] : 2 Time(s)
118-168-105-58.dynamic.hinet.net[118.168.105.58] : 2 Time(s)
118-168-107-79.dynamic.hinet.net[118.168.107.79] : 2 Time(s)
123-204-26-173.dynamic.seed.net.tw[123.204.26.173] : 2 Time(s)


Unrecognized warning:
SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory : 80 Time(s)

---------------------- postfix End -------------------------

What are they trying to do?