I can only send mail but can not receive mail since I uninstall MailScanner.
This is my email log
Nov 20 22:34:51 microchips spamd[903053]: spamd: server successfully spawned child process, pid 903067
Nov 20 22:34:51 microchips spamd[903053]: prefork: child states: SI
Nov 20 22:34:51 microchips spamd[903053]: prefork: child states: II
Nov 20 22:35:10 microchips postfix/smtps/smtpd[902312]: warning: unknown[212.70.149.71]: SASL LOGIN authentication failed: Invalid authentication mechanism
Nov 20 22:35:14 microchips postfix/smtps/smtpd[902312]: lost connection after AUTH from unknown[212.70.149.71]
Nov 20 22:35:14 microchips postfix/smtps/smtpd[902312]: disconnect from unknown[212.70.149.71] ehlo=1 auth=0/1 rset=1 commands=2/3
Nov 20 22:36:06 microchips postfix/smtps/smtpd[902312]: connect from unknown[212.70.149.71]
Nov 20 22:36:15 microchips postfix/smtpd[903098]: connect from unknown[141.98.10.217]
Nov 20 22:36:15 microchips postfix/smtpd[903098]: warning: unknown[141.98.10.217]: SASL LOGIN authentication failed: Invalid authentication mechanism
Nov 20 22:36:15 microchips postfix/smtpd[903098]: disconnect from unknown[141.98.10.217] ehlo=1 auth=0/1 quit=1 commands=2/3
Nov 20 22:36:19 microchips spamd[903053]: spamd: server killed by SIGTERM, shutting down
Nov 20 22:36:20 microchips spamd[903104]: logger: removing stderr method
Nov 20 22:36:22 microchips spamd[903109]: spamd: server started on IO::Socket::IP [127.0.0.1]:783, IO::Socket::IP [::1]:783 (running version 3.4.0)
Nov 20 22:36:22 microchips spamd[903109]: spamd: server pid: 903109
Nov 20 22:36:22 microchips spamd[903109]: spamd: server successfully spawned child process, pid 903110
Nov 20 22:36:22 microchips spamd[903109]: spamd: server successfully spawned child process, pid 903111
Nov 20 22:36:22 microchips spamd[903109]: prefork: child states: SI
Nov 20 22:36:22 microchips spamd[903109]: prefork: child states: II
Nov 20 22:36:29 microchips postfix/smtps/smtpd[902312]: warning: unknown[212.70.149.71]: SASL LOGIN authentication failed: Invalid authentication mechanism
Nov 20 22:36:34 microchips postfix/smtps/smtpd[902312]: lost connection after AUTH from unknown[212.70.149.71]
Nov 20 22:36:34 microchips postfix/smtps/smtpd[902312]: disconnect from unknown[212.70.149.71] ehlo=1 auth=0/1 rset=1 commands=2/3
What is the solution?