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I am having five servers. in that I have installed postfix on server5 and smtp request[say smtp server is abcsmtp.xyz.com] is processed for Server5.
I have configured postfix and now I am able to send mails using mail command from server5 by abcsmtp.xyz.com]
similarly I am able to send mail from Servers 1,2,3,4 with the help of server5 relay.
Now I have to do some enhancements. I just want to send mail only from one mail id(i.e., email@example.com).. if mails are coming from some other id , I should restrict it.. How can I achieve it. Please help me on this.
if I am adding sender_access with firstname.lastname@example.org OK. I am able to send mail from all other ids. kindly help me on this