What are the top AI tools for email marketing in 2025?

The top AI tools for email automation in 2025 are ActiveCampaign, Mailchimp, HubSpot, ConvertKit and a few more.

Some of the best practices are as follows:

• Find the right sender
• Make the process unsubscribing clean and simple
• Use segmentation and personalization
• Remove the inactive users.

A high spam complaint rate can significantly impact your email campaign performance and domain reputation. As a sender, you may start seeing your emails land in the spam folder or get completely blocked by providers like Gmail, Yahoo, and Outlook. Based on experience, anything above the standard 0.1% spam complaint rate starts raising red flags. This not only affects your email deliverability, but also ISP trust, and eventually, your brand's credibility suffers as people begin marking your messages as unwanted. To avoid this, it's important to:

• Maintain clean lists (no purchased or outdated emails)
• Personalize your content and provide value
• Always include a clear unsubscribe option
• Use a trusted SMTP service with good IP reputation

I personally recommend using platforms like SMTPWire, which are built for high inbox placement, sender score protection, and have built-in mechanisms to monitor spam-related issues.

Anything less than 0.1%, or one complaint for every 1,000 delivered messages, is the industry benchmark for acceptable spam complaint rates. Above this threshold, anything is regarded as high. Leading inbox providers like Gmail have established this as the industry standard.

The percentage of recipients of your emails who flagged them as spam is known as your spam complaint rate. For instance, your spam rate is 0.1% (5/5,000) if you send 5,000 messages and 5 of those recipients designate them as spam.