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Email address (mail) is a user attribute defined in RFC4524. From RFC4524: "The mail (rfc822mailbox) attribute type holds Internet mail addresses in Mailbox RFC5321 form (e.g., user@example.com)."

LDAP Syntax

IA5 String {256}

# of Valuesmulti-valued
ReferenceseduPerson, RFC4524

Use in the InCommon Federation

When working with InCommon Participants, an email address should only be used as a mean of contact. It is not a suitable user identifier (see: Why is email address not an appropriate user identifier?).

mail is a required attribute in the REFEDS Research & Scholarship (R&S) entity category

SAML Response Example

<samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"         
                ID="..." Version="2.0" IssueInstant="2020-07-17T01:01:48Z" 
                Destination="..." InResponseTo="...">
  <saml:Assertion ...>
      <saml:Attribute xmlns:x500="urn:oasis:names:tc:SAML:2.0:profiles:attribute:X500"
                      Name="urn:oid:0.9.2342.19200300.100.1.3" FriendlyName="mail" 
         <saml:AttributeValue xsi:type="xsd:string">mjc@example.edu</saml:AttributeValue>

See Also