Hi inocente106, welcome to SAF
There are some tricky issues to this, but if I was you, I will not wondering about... If people tells you that you've sent e-mails, then I would be worried.
Some mail providers (and mailboxes) will take some time to let you receive mails, as there are some "priority" preferences depending on one or another.
You'll probably will receive them soon, or, your mailbox is full, and senders will be notified.

Chris