we don’t want the file to be created with crazy perms (mail has write access on GNU). the mail user’s default 0022 umask will do the job just fine, as there is a sticky-bit over there already.
cp -pi /etc/default/useradd /etc/default/useradd.dist vi /etc/default/useradd CREATE_MAIL_SPOOL=no
create a mailbox
grep ^no /etc/group #useradd -g nogroup -m check useradd -g nogroup -m -s /sbin/nologin check #-k /dev/null #-s /bin/false #-s /dev/null #passwd USER
remove a mailbox and loose its data
userdel -r USER
make sure the unix socket for SPF is there
netstat -an | grep policy
check the queue
#mailq postqueue -p
flush the queue
#runq #postfix flush postqueue -f
apply minor config change
postfix check && echo ok postfix reload
restart
which postfix postfix stop ps auxww | grep master postfix check && echo ok postfix start
and on netbsd eventhough you might have built it from source, YOU CAN keep using system’s built-in rc script
/etc/rc.d/postfix restart
tail -100 -F /var/log/maillog /etc/rc.d/postfix restart
and in case this is a custom build
vi /etc/rc.local /usr/sbin/postfix start && echo -n postfix330 /usr/sbin/postconf -d | grep version
tail -F /var/log/mail.* systemctl restart psotfix
postsuper -d ALL
How to delete mail queue in Postfix https://sharadchhetri.com/2014/02/06/how-to-delete-mail-queue-in-postfix/
Deal with spam that eventually came through the hereby protections (wow, so that’s a clean spam!): look at the headers what fqdn connected to your MX and reject it manually so it doesn’t spam you again,
vi /etc/postfix/client_access compute.amazonaws.com REJECT compute.amazonaws.com is identified as a spam domain .compute.amazonaws.com REJECT compute.amazonaws.com is identified as a spam domain postmap /etc/postfix/client_access
unblock your server from MS’s blacklists:
How to Remove Your IP from the Hotmail Blacklist https://www.rackaid.com/blog/hotmail-blacklist-removal/
Microsoft’s Sender Information Form https://support.live.com/eform.aspx?productKey=edfsmsbl3&ct=eformts&wa=wsignin1.0&scrx=1
register to live.com and define your IP into SNDS: https://postmaster.live.com/snds/
then file a request to un-block your IP: https://support.microsoft.com/en-us/getsupport?oaspworkflow=start_1.0.0.0&wfname=capsub&productkey=edfsmsbl3
5 top tips for reviewing your Postfix mail queue https://www.wirehive.com/thoughts/5-top-tips-reviewing-postfix-mail-queue/
How to create linux account with useradd without creating mail spool https://serverfault.com/questions/522556/how-to-create-linux-account-with-useradd-without-creating-mail-spool