Original message:

To: bill@irs.gov

Hi.

qmail-inject Fill in the complete envelope and header:

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

| From: joe@heaven.af.mil

| To: bill@irs.gov

|

| Hi.

V

qmail-queue Store message safely on disk.

Trigger qmail-send.

|

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

| Is irs.gov in locals? No.

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

| Is irs.gov in virtualdomains? No.

| Is .gov in virtualdomains? No.

| Deliver remotely to bill@irs.gov.

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qmail-rspawn Run qmail-remote.

|

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

Is irs.gov listed in smtproutes? No.

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

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

RCPT TO:<bill@irs.gov>