See this example:
#telnet hermes.joel.co.in 25 Trying 188.8.131.52... Connected to hermes.joel.co.in. Escape character is '^]'. 220 hermes.joel.co.in ESMTP i-MSCP Git Master Managed HELO athena.joel.co.in 250 hermes.joel.co.in MAIL FROM:<[email protected]> 250 2.1.0 Ok RCPT TO:<[email protected]> 450 4.2.0 <[email protected]>: Recipient address rejected: Greylisted, see http://postgrey.schweikert.ch/help/kgimoa.com.html RCPT TO:<[email protected]> 250 2.1.5 Ok RCPT TO:<[email protected]> 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table
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.