The Delivery Optimization feature strips all HTML formatting from your email copy and sends it as plain text. This can improve deliverability since HTML emails are more likely to trigger spam filters than plain-text messages.
Why Send Text-Only Emails?
Better deliverability. Spam filters are more likely to flag HTML emails. Plain-text emails have a higher chance of reaching the inbox.
Broader compatibility. Some email clients, browsers, and devices can't render HTML or load images. Plain-text emails display reliably across all platforms. Some recipients also block HTML emails for security and privacy reasons.
Enabling Delivery Optimization for a Campaign
Go to Campaign → Options tab
Scroll down to Delivery Optimization
Select either "Send all emails as text-only" or "Send first email as text-only"
Click Save
Note: Delivery Optimization also disables open tracking.
Once enabled, images will be removed from your emails, and HTML links will be converted to plain URLs displayed next to the linked text.
Hyperlinks will look like this:
Instead of this:
Enabling Text-Only Across All Campaigns
You can apply text-only formatting to the first email of every campaign in your workspace:
Go to the Advanced Deliverability setting
Enable Always Send First Email as Text-Only.
This setting applies to all campaigns in the workspace and overrides individual campaign settings for Step 1.
