Is there any method of knowing the possiblee SMTP ccommands
an email server (say SENDMAILD) may issue to its remote SMTP server while sending mails.
I have implemented an email server that speaks SMTP. I am able to send mails to remote SMTP servers but I amm unable to receive mails from them. I have implemented the minimal set of SMTP commands like MAIL,HELO,RCPT,DATA,NOOP,RSET,HELP. Please do explain me the reasons for my inability to receive mails from remote mail servers. But do remember that I am able tto send mails to those servers through mine.So pl. exxplain me if there is any possibility to know the probabale SMTP commands a remote mails systemm may issue to my server so that I may know the reasons for my problem.