some import  configure: plugin {   mail_filter = mail-filter %u # %u = username given to the script as first   mail_filter_out = mail-filter-out %u }

service mail-filter {  executable = script /usr/local/bin/mail-filter.sh  user = dovecot  unix_listener mail-filter {    mode = 0600    user = vmail  } } service mail-filter-out {  executable = script /usr/local/bin/mail-filter-out.sh  user = dovecot  unix_listener mail-filter-out {    mode = 0600    user = vmail  } } protocol lda {     mail_plugins = quota sieve expire autocreate mail_filter     auth_socket_path = /var/run/dovecot/auth-master

    rejection_subject = Rejected: %s     lda_mailbox_autocreate = yes     lda_mailbox_autosubscribe = yes     sendmail_path = /usr/sbin/sendmail }

cat mail-filter-out.sh #!/bin/sh cat > tempfile

cat  mail-filter.sh #!/bin/sh

USER=$1 cat > tempfile

Some important Error logs： Feb 07 15:49:19 lda(q1@a.com)<53648><rY6oIH8WPV6Q0QAA0J78UA>: Error: Mailbox INBOX: Saving mail: write(/home/a.com/q1/storage/m.1) failed: EOF without input Feb 07 15:49:19 lda(q1@a.com)<53648><rY6oIH8WPV6Q0QAA0J78UA>: Info: msgid=<77z2kkfmm1-7846bu3tx6@nsmail6.0>: save failed to INBOX: Mailbox INBOX: Saving mail: write(/home/a.com/q1/storage/m.1) failed: EOF without input Feb 07 15:49:19 lda(q1@a.com)<53648><rY6oIH8WPV6Q0QAA0J78UA>: Debug: auth-master: conn unix:/var/run/dovecot/auth-master (pid=10651,uid=0): Disconnected: Connection closed (fd=11)