Messages to my call sign automatically go to RadioMail whether it's open or not

I use RadioMail with Mobilinkd 3 on an iPhone.
I also use Winlink on a laptop with a different TNC.
Any message sent to my call sign goes automatically to my RadioMail inbox, even when my RadioMail app is not on.
As a result, when I open Winlink on my laptop, my inbox there is always empty–all messages have already gone to my RadioMail app.
This a problem when I have to answer Winlink messages with forms (which I can do from my laptop), because I can’t work with forms on my RadioMail app without paying a special fee for use of forms.
Is there a way to prevent messages sent to my callsign from being automatically sent to my RadioMail app, without my checking into Winlink myself?

RadioMail fetches messages automatically if Settings → Automatic Fetch is enabled. Turn that off to stop it from checking mail in the background.

Once a message is downloaded by any client (like RadioMail), it’s removed from the CMS and won’t show up in Winlink Express. To ensure messages go to Winlink Express instead, disable Automatic Fetch in RadioMail and check mail from your laptop first.

Thank you!
Bernard - VA7BLR