Definition
A plain text email is a message that contains only unformatted text — no HTML, images, colours or styling. It relies entirely on the text content, making it one of the simplest and most compatible forms of email.
Many senders include a plain text version alongside the HTML version in a multipart message, so clients that cannot render rich content receive a readable, styled-free fallback. Plain text is also associated with genuine human communication and can support trust and deliverability.
Plain Text vs HTML Email
| Factor | Plain Text | HTML |
|---|---|---|
| Formatting | None | Rich, styled |
| Images | None | Supported |
| Compatibility | Extremely broad | Requires client support |
| Perceived source | Often more personal | Often more commercial |
Each format suits a different role in a campaign.
Why Plain Text Matters
- Fallback role: Serves clients that cannot render HTML.
- Reputation signal: Filters often rate plain text more favourably.
- Accessibility: Reads well in limited or screen-reader environments.
- Personal tone: Text-only reads more human and less automated.
How to Use Plain Text Well
- Send both versions: Use multipart so HTML clients get rich content and others get text.
- Write real text: Keep the fallback readable rather than a blank or copied shell.
- Preserve structure: Use line breaks, not HTML, for layout.
- Include key info: Links and calls to action must work without markup.
Related Glossary Terms
Abuse Complaint
An abuse complaint is a report from a recipient who marks an email as spam, which negatively affects sender reputation and deliverability.
Alt Text
Alt text is the written alternative to an image in an email, displayed when images are blocked, slow to load, or consumed by screen readers.
AOL Mail for Email Marketers
AOL Mail is a legacy email provider with specific deliverability requirements and rendering quirks, now operating as part of the Yahoo+AOL network under shared infrastructure.
Email Authentication Protocols
Email authentication protocols are technical standards that verify the identity of an email sender, helping mailbox providers distinguish legitimate mail from spam and phishing.
BIMI
BIMI (Brand Indicators for Message Identification) is an email standard that allows brands to display their logo next to their emails in supported email clients. It requires DMARC enforcement at quarantine or reject policy.
Bounce Management
Bounce management is the process of handling emails that are rejected by mailbox providers, including classification, removal of bad addresses and protection of sender reputation.
Frequently Asked Questions
A plain text email is a message containing only unformatted text with no HTML, images, or styling. It relies purely on the text content and is one of the most broadly compatible email formats.
Filters and receiving environments often treat plain text more favourably than heavily formatted HTML, associating it with genuine human communication. Including a plain text version in a multipart message can therefore support inbox placement.
For most marketing, send both in a multipart message. That gives capable clients the rich HTML version while providing a readable plain text fallback for limited clients, filters, and accessibility.
Often. Because it lacks commercial formatting and images, a well-written plain text message can feel more like a real person wrote it. This helps transactional and personal messaging build trust, though it offers less visual appeal.