qmail-smtpd Receive message by SMTP from another host: | MAIL FROM: | RCPT TO: | | Is $RELAYCLIENT set? No. | Is heaven.af.mil in rcpthosts? Yes. | Accept RCPT. V qmail-queue Store message safely on disk. Trigger qmail-send. | V qmail-send Look at envelope recipient, joe@heaven.af.mil. | Is heaven.af.mil in locals? Yes. | Deliver locally to joe@heaven.af.mil. V qmail-lspawn ./Mailbox | Look at mailbox name, joe. | Is joe listed in qmail-users? No. | Is there a joe account? Yes. | Is joe's uid nonzero? Yes. | Is ~joe visible to the qmailp user? Yes. | Is ~joe owned by joe? Yes. | Give control of the message to joe. | Run qmail-local. V qmail-local joe ~joe joe '' '' heaven.af.mil bill@irs.gov ./Mailbox Does ~joe/.qmail exist? No. Write message to ./Mailbox in mbox format.