My autoresponder emails are flagged as suspected spam

I have autoresponder emails set up for my forms that work as required, however they come into the recipient's inbox marked as suspected spam in the subject line. I have changed the sender email from the default noreply@jotform.com address to a verified one, however it still comes up as 'suspected spam'.

Is there any way around this?

thanks.

I tested your form and Autoresponder came fine:

Could you tell us please, what are the email addresses that received the autoresponders in that way?

Thank you!