---
title: emailAddress
description: OID
component: pingds
version: 8.1
page_id: pingds:schemaref:at-emailAddress
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-emailAddress.html
---

# emailAddress

|                             |                                                                |
| --------------------------- | -------------------------------------------------------------- |
| *OID*                       | 1.2.840.113549.1.9.1                                           |
| *Names*                     | emailAddress                                                   |
| *Description*               | represents the email address part of an X.509 certificate      |
| *Syntax*                    | [IA5String](s-IA5String.html)                                  |
| *Equality matching rule*    | [caseIgnoreIA5Match](mr-caseIgnoreIA5Match.html)               |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)     |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html) |
| *Single value*              | false: multiple values allowed                                 |
| *User modification allowed* | true                                                           |
| *Usage*                     | userApplications                                               |
| *Origin*                    | [RFC 2985](https://datatracker.ietf.org/doc/html/rfc2985)      |
| *Schema file*               | 00-core.ldif                                                   |