| How often does qmail retry to send email? |
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Each message has its own retry schedule. The longer a message remains undeliverable, the less frequently qmail tries to send it. The retry schedule is not configurable. The following table shows the retry schedule for a message that's undeliverable to a remote recipient until it bounces. Local messages use a similar, but more frequent, schedule.
| Delivery Attempt |
Seconds |
D-HH:MM:SS |
| 1 |
0 |
0-00:00:00 |
| 2 |
400 |
0-00:06:40 |
| 3 |
1600 |
0-00:26:40 |
| 4 |
3600 |
0-01:00:00 |
| 5 |
6400 |
0-01:46:40 |
| 6 |
10000 |
0-02:46:40 |
| 7 |
14400 |
0-04:00:00 |
| 8 |
19600 |
0-05:26:40 |
| 9 |
25600 |
0-07:06:40 |
| 10 |
32400 |
0-09:00:00 |
| 11 |
40000 |
0-11:06:40 |
| 12 |
48400 |
0-13:26:40 |
| 13 |
57600 |
0-16:00:00 |
| 14 |
67600 |
0-18:46:40 |
| 15 |
78400 |
0-21:46:40 |
| 16 |
90000 |
1-01:00:00 |
| 17 |
102400 |
1-04:26:40 |
| 18 |
115600 |
1-08:06:40 |
| 19 |
129600 |
1-12:00:00 |
| 20 |
144400 |
1-16:06:40 |
| 21 |
160000 |
1-20:26:40 |
| 22 |
176400 |
2-01:00:00 |
| 23 |
193600 |
2-05:46:40 |
| 24 |
211600 |
2-10:46:40 |
| 25 |
230400 |
2-16:00:00 |
| 26 |
250000 |
2-21:26:40 |
| 27 |
270400 |
3-03:06:40 |
| 28 |
291600 |
3-09:00:00 |
| 29 |
313600 |
3-15:06:40 |
| 30 |
336400 |
3-21:26:40 |
| 31 |
360000 |
4-04:00:00 |
| 32 |
384400 |
4-10:46:40 |
| 33 |
409600 |
4-17:46:40 |
| 34 |
435600 |
5-01:00:00 |
| 35 |
462400 |
5-08:26:40 |
| 36 |
490000 |
5-16:06:40 |
| 37 |
518400 |
6-00:00:00 |
| 38 |
547600 |
6-08:06:40 |
| 39 |
577600 |
6-16:26:40 |
| 40 |
608400 |
7-01:00:00 |
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