There are several strategies marketers can use to overcome firewall restrictions:
IP Warming: Gradually increasing the volume of emails sent from a new IP address to build a positive reputation. Content Optimization: Ensuring that email content is relevant, valuable, and free from spammy keywords. Authentication Protocols: Implementing authentication methods like SPF, DKIM, and DMARC to verify the legitimacy of your emails. Monitoring Sender Reputation: Regularly checking and maintaining a good sender reputation to avoid being flagged by firewalls.