How does confluence avoid to flood relay mail server when sharing pages to large groups?

[Flavio Beck]

Supose I have a large group (~ 6000 users).

When I share a page to that group, Confluence may create 6000 emails (not a unique email for 6000 destinations, I hope).

So, it goes to mail queue and will be sent to exchange relay server.

How it is sent ?

Is there some algorithm to delay? or it can flood the relay server?

Could the relay server consider an attack and discard the email oringn?

I had a situation some time ago, and only users from name A to F had received the shared page, all others did not receive.

No log errors, and the queue was completely sent to relay, but it did not forward to destinations.

[Midori]

I doubt that there is any algorithm or intelligence to reduce the one-time load. Confluence sends out the emails fastest it can.

(We had a similar question related to the Archiving Plugin, and never received a definite answer from Atlassian. Looking at the Confluence source code, I don't see any extract logic.)

[Boris Berenberg]

I believe that it will send at the rate which the mail server will accept connections at. If you do not see any errors in the Confluence logs, then I would look into your mail server logs as it may be silently discarding emails. Or there may be a different problem at play here.