1                 Original message:

     2                    

     3                    To: bill@irs.gov

     4                    Hi.

     5                    

     6 qmail-inject    Fill in the complete envelope and header:

     7                    

     8      |             (envelope) from joe@heaven.af.mil to bill@irs.gov

     9      |             From: joe@heaven.af.mil

    10      |             To: bill@irs.gov

    11      |             

    12      |             Hi.

    13      V             

    14                    

    15 qmail-queue     Store message safely on disk.

    16                 Trigger qmail-send.

    17      |             

    18      V             

    19                    

    20 qmail-send      Look at envelope recipient, bill@irs.gov.

    21      |          Is irs.gov in locals? No.

    22      |          Is bill@irs.gov in virtualdomains? No.

    23      |          Is irs.gov in virtualdomains? No.

    24      |          Is .gov in virtualdomains? No.

    25      |          Deliver remotely to bill@irs.gov.

    26      V          

    27                    

    28 qmail-rspawn    Run qmail-remote.

    29 

    30      |             

    31      V             

    32 

    33 qmail-remote    Look at host name, irs.gov.

    34                 Is irs.gov listed in smtproutes? No.

    35 		Look up DNS MX/A for irs.gov and connect to it by SMTP:

    36                    

    37                    MAIL FROM:<joe@heaven.af.mil>

    38                    RCPT TO:<bill@irs.gov>