Stop and Remove sendmail, with apt-get. Find the package with apt-cache search
Start postfix /etc/init.d/postfix start
Check the postconf mydestination value with:
The issue was that mydestination included my hostname. Apparently you cant have sender and destination same.
So set the value, by:
postconf -e "destination=...." (the other values)
Now, on retrying a mail send, it gets received/
Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.
His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.
When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.