My sent emails are filtered as junk by Office 365

I’m using a custom gmail account, i.e. it’s a gmail but not
When I send messages using em cliet to office 365 users, it often get marked as junk.
When I send the same receipents the email directy from the gmail web application, all is working well.

Hello Tomer,
are you using any Signatures or Templates inside eM Client?


Hi Olivia,
I use a signature that I editted within eM client. No templates

Can you try sending out an email without the signature and see if the issue persist?