Outlook unable to send more than 20 emails

[Mehdi HAMMADI]

Hi the community,

I hope you are all fine and safe.

I'm using the Outlook desktop client with a MS365 licence.

I have added a pop3 account and when I send, in one time, more than 20 emails only the first 20 emails are sent, the rest of the emails remain in the Sending Box. If I close Outlook and reopen it, the next 20 emails are sent and so on.

Do you know what is the problem and how to solve it. Thank you

Regards

Mehdi

[#2]

@Mehdi HAMMADI Did you ever get a resolution for this issue? I am experiencing the same issue. Thank you.