I have a website where mails are sent. Those mails from website (contact mail, booking mail) are being sent well. But when I go to shell with ssh and give sendmail myemail@mail.com it is not sending. the error log in /var/log/mail says: did not issue MAIL/EXPN/VRFY/ETRN during connection to MTAsome time ago, i had a problem with permission, i changed without knowing the permission of /etc/ folder, then later i did chmod 755 /etc/ then everything seemed to work properly. but now, i am getting this error. server os is openSuse. what can I do? 
sendmail not working
email;opensuse;sendmail;smtp