InformatiQ

This is a simple way to test if your server is able to do STARTTLS or not

openssl s_client -starttls smtp -crlf -connect your.mail.server:25

Microsoft Exchange Hosted Services is a new service by Microsoft to provide email security services, in short it scans incoming and outgoing mails for SPAM, Virus and policy violations.
what i discovered is that their smtp service is running POSTFIX

rhanna@rhanna:~$ dig somedomain.com MX

; <<>> DiG 9.3.2 <<>> npcegypt.com MX
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13422
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;somedomain.com. IN MX

OK maybe my history with qmail doesn't go a long way (just 3 month) but i guess i got a hold of it
I'm already running a mail server with 30+ domains and 3000+ mailboxes

what i want to do in this series of posts is talk about setting up a qmail server to host multiple domains, while there is a pretty good guide at www.qmailrocks.org i will not go into a lot of details, but rather explain things that i could not really get from qmailrocks.

introduction: