Missing "Delayed Mail (still being retried)" bounce DSNs

[chrisjj]

Since I started using FM is 2006, I have received Fastmail Subject: "Delayed Mail (still being retried)" soft-bounce DSN messages as appropriate.

But none since 2023-12-14 - despite in 2024 many delays (some over over 12hrs) of messages from FM Send a copy... command (rule or manual) to Gmail.

Are other users still receiving them?

Past DSNs said e.g. https://i.imgur.com/zDR2LMM.png

- Your message could not be delivered for more than 1 hour(s).
- It will be retried until it is 1 day(s) old.
-
- For further assistance, please read our help center article about message bounces
-
- https://www.fastmail.help/hc/en-us/a...es-bounce-back

That article (currently) says:

- If you send an email that was not successfully delivered to the recipient, you will
- receive a message letting you know that the message has bounced.
- ...
- If the code starts with 4 (also referred to as a 4xx code), this means that the message
- has been soft bounced. A soft bounce occurs if the mail system believes that the
- issue causing the bounce may be temporary, and decides to continue making
- attempts to deliver the message for a short amount of time (often 1 day or so).

but some 2024 4xx DSNs here have instead Subject: "Undelivered Mail Returned to Sender" and conspicuously omit the retry promise https://i.imgur.com/EMcCIjw.png. Indeed in a queried instance, Support confirmed that no retry took place. Despite that, I would not like to have to conclude that FM has ceased the "Delayed Mail (still being retried)" soft-bounce DSNs without confirmation.

Thanks.

[Grhm]

I'm still getting them. Although I filter them into trash cos I don't see the point of them. You want to know if an e-mail has not been able to be delivered; but how is it useful to be told that it might be delivered in a bit.. but on the other hand it might not be?

[chrisjj]

Thanks.

Originally Posted by Grhm

You want to know if an e-mail has not been able to be delivered; but how is it useful to be told that it might be delivered in a bit.. but on the other hand it might not be?

Very useful to me, because it tells me there is no need to resend.

[Terry]

Try enabling SRS in your alias settings....

[chrisjj]

Originally Posted by Terry

Try enabling SRS in your alias settings....

Are you suggesting that would cause FM to issue these missing DSN soft-bounce messages?

[Terry]

Read what it is saying in that section....sadly I am not 100% sure.

[chrisjj]

Originally Posted by Terry

Read what it is saying in that section....sadly I am not 100% sure.

I've read what I can find about SRS rewriting in both UI and Help, and don;t see anything suggesting it will might restore these missing DSNs. Thanks anyway for the thought.

[hadaso]

Originally Posted by Grhm

... but how is it useful to be told that it might be delivered in a bit.. but on the other hand it might not be?

E.G. if it says the recipient is over quota you can phone the recipient and tell them they should do something to get the file you sent them.
Sometimes you would want to use anther means of communication if you know the message was still not delivered.
Most people expect email to be delivered within at most a few minutes after it was sent. So if it is not delivered after about an hour a user should be notified that the delivery is delayed.

[chrisjj]

Does anyone here have an over-quota mailbox to which I may send a test message? Thanks.