# Invoice #4412

billing@example.com → ada@example.net deferred

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## Message

Domainexample.com
Applicationbilling
Accepted2026-08-15 20:14:02 UTC
Status reported2026-08-15 20:14:08 UTC
Queue id4C3A1E2F1A
Journal id1842

## History

1. 2026-08-15 20:14:02 UTC

   accepted Received by the relay

   SASL login billing, queued as 4C3A1E2F1A.

2. 2026-08-15 20:14:08 UTC

   deferred Receiving MX asked to try later

   Postfix retries: first after 5 minutes, then with increasing gaps up to 1 hour 7 minutes, for up to 5 days. There is no fixed attempt count — a deferred message stays in the queue until it is delivered or that lifetime runs out.

3. not yet

   delivery Waiting on the next retry

## Delivery log

Time | Message
--- | ---
20:14:02 | postfix/smtpd[221]: 4C3A1E2F1A: client=203.0.113.40, sasl_username=billing
20:14:02 | postfix/cleanup[224]: 4C3A1E2F1A: message-id=<4412@example.com>
20:14:08 | postfix/smtp[230]: 4C3A1E2F1A: to=<ada@example.net>, relay=mx.example.net[198.51.100.20]:25, delay=6, status=deferred (450 4.2.1 mailbox busy)

20:14:08

status=deferred (450 4.2.1 mailbox busy)

20:14:02

client=203.0.113.40, sasl_username=billing