Incoming emails are fine but outgoing are stuck in outbox

The emails that I am attempting to send are stuck in my outbox. I’m receiving emails but can’t send any. Please help. Thank you. Doug.

Do you have any very large file attachments connected to the stuck emails in your outbox ?

If you do what size are they in total. Do they total eg: around 25mb or over as some SMTP servers restrict sending too larger file attachment sizes and just sit in the outbox.

However if no large file attachments are connected to the outbox emails, do you run any optional eg: Antivirus scanning programs, or optional firewall / security programs or VPNs etc other than comes default with your OS ?

If you do try completely disabling any of those to test and close and reopen eM Client and see if the emails stuck then send ok.

Failing that if not any optional programs like the above, how long has this problem been happening ? Has it only just started since you eg: installed a new version of eM Client or has it been like this for a while. Also what version of eM Client do you have and do you have Windows or Mac