Sieve Filter 32 action limit

[S B]

(Request has been changed since posting)

Please add the two max_sieve values as an option in the admin control panel

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Original issue

If you create a 'redirect (alias) mailbox' and have multiple recipients (for example 25) it does NOT deliver to them all consistently.

However, setting up a 'normal mailbox' and using 'Send a copy email...' and adding the 25 recipients there DOES work.

[SH]

What do you mean by "NOT deliver to them all consistently". I've observed that batch is devided to batches with 20 emails and second batch is delivered minutes after first

[S B]

After much further testing it appears this is limited to 32 addresses for redirection.

If you send a "copy" to 33 the email fails to deliver

If you send to 32 or less it delivers

Is this a built in limitation? and is there a way around it for clients with a larger amount of mailboxes?

[S B]

Just to clarify this is using the "copy incoming emails to …" sieve filter

[S B]

# poste.io copy filter
require ["copy"];
if true
{
      redirect :copy "[e-mail]";
      redirect :copy "[e-mail]";
      redirect :copy "[e-mail]";
      redirect :copy "[e-mail]";
      redirect :copy "[e-mail]";
      redirect :copy "[e-mail]";
      redirect :copy "[e-mail]";
……..

}

[S B]

https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration

sieve_max_actions = 32 The maximum number of actions that can be performed during a single script execution. If set to 0, no limit on the total number of actions is enforced.

Could this be it?

[Scott MacDonald]

It could also be sieve_max_redirects. Either way, these should be found in the dovecot conf.d folder/directory.

[S B]

Thank you Scott, I will give this a go today! Hopefully it can be a configurable option in the admin interface but for now if this works that will be fine.

[S B]

Scott, thank you this worked perfectly.

If anyone else needs this, here is how:

## Access the file system of running container
docker exec -it <container-name> bash

## Edit SIEVE config
nano /etc/dovecot/conf.d/90-sieve.conf

# EDITS
sieve_max_actions = 100     #was 32 and commented out
sieve_max_redirects = 100   #was 40

# Save File
Ctrl+X (Exit)
Y (Save - Yes)
Enter (Confirm)

[S B]

S H - Please may I request this is added as a configurable option in the administration area when you have time?

Thanks

[Scott MacDonald]

Excellent... you likely already know, but just as a reminder those changes won't persist through container creates. For example: performing a version upgrade.

Curious, it would seem the actions setting trumps the redirect setting as you should have seen 40 successful redirects.

[S B]

Thank you, I had a suspicion this would be the case.

You are correct with the priority, it seems to be this way on my (many!) tests.

Curiously, although you would expect 32 to deliver, and the rest not to deliver, it looks like it doesn't process the sieve filter at all if it goes over this action count/amount (and I assume the same for redirect). So if you have max 32 and a sieve filter with 33 it doesn't run at all.

Set to 100 just to be certain it works :)

[S B]

SH - It might also be worth limiting the sieve filters 'Add another recipient' to the current configured maximum (for Copy + Redirect mail sieve pages), as currently you can add more than 32 on the admin panel.

[SH]

add Sieve limits settings (fix #471) and DMARC reports settings

→ <<cset 24fb181f5b0f>>

[SB]

Thank you for sieve limit update in admin area, saves me time every update now :)