My mails are stuck in my outbox when they contain an attachment

My mails are stuck in my outbox when they contain an attachment Hi ! I got this problem : at my office, the internet connexion is bad. So when we are sending mails using emclient with attachment file, they stay stuck in the out box. But as I’m sending it to my gmail account, I can see they are correctly received. Does anyone has a solution for this ? Thank’s a lot !

I have the same problem with big attachments. Small attachments are OK. I had this problem after I upgraded a few months ago. Then the problem disappeared, but now it’s back! I’m now scared to run any eMClient upgrades.

I have this problem as well, stuck in outbox and spamming recipient