The preheader is a short line of hidden HTML text placed at the top of an email's source code, designed specifically to appear as preview text in email clients without being visible in the email body. It's hidden with CSS (white text, zero font size, or display:none). Preheaders give you control over what subscribers see before opening without affecting email design. MisarMail sets preheader text separately from email body content.

Related Terms

Preview Text (Preheader)

The short text displayed after the subject line in the inbox, giving recipients additional context before opening.

Email Subject Line

The first line of text visible in the inbox before an email is opened — the primary driver of open rate.

Open Rate

The percentage of delivered emails that were opened by recipients.

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