We are having a problem with sending an email to Orange server.
The Orange server answers us:
Service refused, please try later. OFR_108; (This is not a surprise, we know this issue)
On Smartermail, the "Intervals between each test" parameter is configured as follows:
4, 15, 30, 60, 90
We can verify that it does this delay up to 60 minutes.
First Exchange :
14:13:42.866  Delivery started for email@example.com (via bypass) at 14:13:42
Last Exchange :
[2020.02.13] 16:04:18.477  RSP: 421 mwinf5c80 ME Service refuse. Veuillez essayer plus tard. Service refused, please try later. OFR_108; 
[2020.02.13] 16:04:18.477  CMD: QUIT
[2020.02.13] 16:04:23.493  Attempt to ip, '18.104.22.168' success: 'False'
[2020.02.13] 16:04:23.493  Delivery for firstname.lastname@example.org to email@example.com has bounced. Reason: Remote host said: 601 Attempted to send the message to the following IPs:
[2020.02.13] 22.214.171.124, 126.96.36.19916:04:23.493  DSN email written to -861623333391 with status failed to firstname.lastname@example.org
[2020.02.13] 16:04:23.493  Delivery for email@example.com to firstname.lastname@example.org has completed (Bounced)
[2020.02.13] 16:04:23.493  Removed from RemoteDeliveryQueue (5 queued or processing)
[2020.02.13] 16:04:25.805  Removing Spool message: Killed: False, Failed: False, Finished: True
[2020.02.13] 16:04:25.805  Delivery finished for email@example.com at 16:04:25 [id:-861623335442]
On the other hand, just one second after the attempt of the 60Minutes of waiting, the logs changes and indicates us at the same time a sending and a bounce
16:04:23.493  Delivery for firstname.lastname@example.org to email@example.com has completed (Bounced)
16:04:25.805  Delivery finished for firstname.lastname@example.org at 16:04:25 [id:-861623335442]
We use the SmarterMail Enterprise Version - 100.0.7053.
Why is the 90 minute attempt not executed?
Why is the email marked both delivery and bounce?
We did not receive any bounce mail on the address email@example.com
Can you help us understand what's going on.
Yes I agree with that, we plan to update very soon.
However, is this a known bug? Why did the server decide to do something other than resend the email 90 minutes later?
In the event of a new failure, the server should send us a non-deliverability email, we have no trace of a return email in the logs.
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For faster and more reliable delivery, add firstname.lastname@example.org to your trusted senders list in your email software.