Unable to send mail with a lot of attachments

I’m using the latest version of emClient with Exchange Online.

All works fine but I cannot send email with some attachments ( e.g. 20 ) where total size is about 12Mb ( limit for Exchange Online is 25mb ).

Mail is stopped in outgoing folder and is not sent.

I’ve tried with Mail app on OS X and works fine.

Any idea on how to solve this?

Hello Davide, does this occur with a specific attachment file type maybe? What version of eM Client are you currently using can you please check the exact release number in Help > About?

Please navigate to the Advanced application settings in Tools > Settings > Advanced and enable Exchange Web Services logging for the problematic account, save the settings and replicate the issue.
Once the error reoccurs, please go back to the Advanced settings window and submit the logging data to my email, mcgregor@emclient.com with a reference link to this forum topic.

Thank you.

Hi Paul,
No, I don’t think so, I have attached only JPG files and 1 PDF document.

emClient version: 6.0.22313.0

I’ve sent you an email with logs, thank you!