Why is my logic app "When a new email arrives (V3)" not triggering on email arrival but on a polling basis?

Question

My emails arrive at about 3.16 and 3.31 each day, however my logicapp sometimes triggers at the same time for both, other times it triggers separately, however it never seems to trigger when the emails arrive but instead seems to check every 30 minutes for any new emails. Is there a reason for this or a way to increase the polling frequency or to make it trigger when the email arrives?

Answer 1

@Anonymous Thanks for reaching out.
There is no configuration for When a new email arrives (V3) that can be used to specify the polling frequency. This is the know limitation as documented here.

Triggers fire on the corresponding event's occurrence almost immediately in most cases, but there could be rare circumstances when the trigger's delay to fire may take up to one hour.

Sharing in more details how the trigger works.

1. Trigger registers a subscription (Webhook) with mailbox to receive updates whenever there is an email arrived at mailbox. Trigger renews the existing subscription every one hour
2. Trigger returns 202 response with Retry-After interval of 60 minutes. It is similar to normal polling trigger but with a long interval.
3. If a new email arrives within this 60 minutes interval, then the connector receives a notification from Graph API (webhook callback). After that It sends request back to Flow/LA telling it that new poll request should happen right away.
4. If the connector doesn’t receive any notifications within 60 minutes interval, then new poll request will happen exactly after 60 minutes to make sure there are no new emails in the specified mailbox.

The alternative could be if your business needs can be done using the shared mailbox which has the option to set the internal for V2 action When a new email arrives in a shared mailbox (V2)

Hope the above clears things up. Let me know if you have any queries or concerns.