Thanks for your help! I have run SUBSCRIBE for INBOX and "Sent Items" and now LSUB "" "*" does return them. When I open meli I see both folders. Success! Still no luck with sending emails, though and I see no errors. I'm testing it by trying to send an email to a disposable address generated by mintemail.com
meli-general
Re: Setting up an Outlook account
| List | meli-general | 
|---|---|
| From | roberto.diremigio@hey.com | 
| To | meli-general@meli.delivery | 
| Subject | [meli-general] Re: Setting up an Outlook account | 
| Date | Tue, 29 Sep 2020 19:31:01 -0000 | 
| In-Reply-To | |
| References |