While there’s no way to guarantee your email doesn’t go to spam, there are a number of email deliverability best practices that’ll help you reach the inbox. Common techniques include  Authenticating your domain name as part of your DKIM signature (the technical email signature that proves your identity to ISPs) Cleaning your email list regularly and removing unengaged contacts to maintain high engagement rates and a trusted sender reputation among ISPs/webmail providers Using a double opt-in confirmation (easily set up with Sendinblue) to avoid misspelled email addresses.  Avoiding spam trigger words (free, cheap, bargain, $$$, bonus, urgent, don’t wait!, etc.) in your email subject line and content.