I have problems with SendGrid since few days but I did not change the way I config my web apps (Django).

I can see in Activity feed of my account that emails are received by SendGrid but Not delivered because "From field did not contain a valid email address".

I check to ensure "From field" is valid and it is.

I have also seen that 103 mails are sent today but it is not true. I thought that daily email are not reset every day... and as I have a free account (100 email/day) it could also be a problem...

Thanks for advices