Glossary
Email client
The software a person uses to read and write email, such as a webmail site, a desktop app or a phone app.
ValidReach Team · Updated 2026-10-26
In practice
Clients render the same message differently, and some block images or strip styles. Test important messages in the clients your audience uses and keep layout simple.
Verification and sending
The client is irrelevant to verification, which concerns the mail server behind the address.