postfixで送受信できない
/var/log/maillogを確認すると
以下のエラーが定期的に発生している
May 22 15:19:56 dti-vps-srv30 postfix/smtpd[56469]: warning: xsasl_cyrus_server_get_mechanism_list: no applicable SASL mechanisms
May 22 15:19:56 dti-vps-srv30 postfix/smtpd[56469]: fatal: no SASL authentication mechanisms
May 22 15:19:57 dti-vps-srv30 postfix/master[19834]: warning: process /usr/libexec/postfix/smtpd pid 56469 exit status 1
May 22 15:19:57 dti-vps-srv30 postfix/master[19834]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling
May 22 15:21:32 dti-vps-srv30 postfix/smtpd[18314]: warning: xsasl_cyrus_server_get_mechanism_list: no applicable SASL mechanisms
May 22 15:21:32 dti-vps-srv30 postfix/smtpd[18314]: fatal: no SASL authentication mechanisms
May 22 15:21:33 dti-vps-srv30 postfix/master[19834]: warning: process /usr/libexec/postfix/smtpd pid 18314 exit status 1
May 22 15:21:33 dti-vps-srv30 postfix/master[19834]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling
May 22 15:27:56 dti-vps-srv30 postfix/smtpd[11579]: warning: xsasl_cyrus_server_get_mechanism_list: no applicable SASL mechanisms
May 22 15:27:56 dti-vps-srv30 postfix/smtpd[11579]: fatal: no SASL authentication mechanisms
May 22 15:27:57 dti-vps-srv30 postfix/master[19834]: warning: process /usr/libexec/postfix/smtpd pid 11579 exit status 1
May 22 15:27:57 dti-vps-srv30 postfix/master[19834]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling