[Migoda]

Thanks for your inputs!

After digging a bit deeper in the code i figured out how TIM handles the mailing. tim.sendQueuedMail() is part of the update callback function (fired from OnUpdate), so one mail from the queue is sent every tick.

TIM uses a custom throttle function to control update ticks for special purposes. I ended up using this function in tim.sendQueuedMail() with my desired delay and it works.

Here is the final code:

function tim.sendQueuedMail()
  if tim.mailQueueindex>0 then
    if (tim.UpdateThrottle("SendQueuedMail", tim.throttleCountMail) == true) then
      -- EINEN MailQueue-Eintrag senden (pro Aufruf dieser Funktion)
      local mailboxwasopen=tim.MailBoxOpen
      if tim.MailBoxOpen==false then
        RequestOpenMailbox()
      end
      tim.wait4mail=true
      tim.MailInQueue=tim.mailQueue.mTO[tim.mailQueueindex]
      tim.MailInQueueSUB=tim.mailQueue.mSUB[tim.mailQueueindex]
      SendMail(tim.mailQueue.mTO[tim.mailQueueindex], tim.mailQueue.mSUB[tim.mailQueueindex], tim.mailQueue.mTEXT[tim.mailQueueindex])
      if mailboxwasopen==false then
        CloseMailbox()
      end
      tim.mailQueueindex=tim.mailQueueindex-1
    end
  end
end