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# std.net.isemail

Validates an email address according to RFCs 5321, 5322 and others.

Authors:
Dominic Sayers , Jacob Carlborg

License:
Boost Software License 1.0

Version:
3.0.13 - Version 3.0 of the original PHP implementation: http://www.dominicsayers.com/isemail

Standards:

- RFC 5321
- RFC 5322

References:

- http://www.dominicsayers.com/isemail
- http://tools.ietf.org/html/rfc5321
- http://tools.ietf.org/html/rfc5322

Source:
std/net/isemail.d

EmailStatus isEmail(Char)(const(Char)[] email, CheckDns checkDNS = CheckDns.no, EmailStatusCode errorLevel = EmailStatusCode.none) if (isSomeChar!Char);
  Check that an email address conforms to RFCs 5321, 5322 and others.

  As of Version 3.0, we are now distinguishing clearly between a Mailbox as defined by RFC 5321 and an addr-spec as defined by RFC 5322. Depending on the context, either can be regarded as a valid email address. The RFC 5321 Mailbox specification is more restrictive (comments, white space and obsolete forms are not allowed).

  Note:
  The DNS check is currently not implemented.

  Parameters:

  const(Char)[] email | The email address to check
  CheckDns checkDNS | If CheckDns.yes then a DNS check for MX records will be made
  EmailStatusCode errorLevel | Determines the boundary between valid and invalid addresses. Status codes above this number will be returned as-is, status codes below will be returned as EmailStatusCode.valid. Thus the calling program can simply look for EmailStatusCode.valid if it is only interested in whether an address is valid or not. The errorLevel will determine how "picky" isEmail() is about the address. If omitted or passed as EmailStatusCode.none then isEmail() will not perform any finer grained error checking and an address is either considered valid or not. Email status code will either be EmailStatusCode.valid or EmailStatusCode.error.

  Returns:
  an EmailStatus, indicating the status of the email address.

enum CheckDns: int;
  Enum for indicating if the isEmail function should perform a DNS check or not.

  no
    Does not perform DNS checking

  yes
    Performs DNS checking

struct EmailStatus;
  This struct represents the status of an email address

  @property bool valid();
    Indicates if the email address is valid or not.

  @property string localPart();
    The local part of the email address, that is, the part before the @ sign.

  @property string domainPart();
    The domain part of the email address, that is, the part after the @ sign.

  @property EmailStatusCode statusCode();
    The email status code

  @property string status();
    Returns a describing string of the status code

  string toString();
    Returns a textual representation of the email status

string statusCodeDescription(EmailStatusCode statusCode);
  Returns a describing string of the given status code

enum EmailStatusCode: int;
  An email status code, indicating if an email address is valid or not. If it is invalid it also indicates why.

  validCategory
    Address is valid

  dnsWarning
    Address is valid but a DNS check was not successful

  rfc5321
    Address is valid for SMTP but has unusual elements

  cFoldingWhitespace
    Address is valid within the message but cannot be used unmodified for the envelope

  deprecated_
    Address contains deprecated elements but may still be valid in restricted contexts

  rfc5322
    The address is only valid according to the broad definition of RFC 5322. It is otherwise invalid

  any
    All finer grained error checking is turned on. Address containing errors or warnings is considered invalid. A specific email status code will be returned indicating the error/warning of the address.

  none
    Address is either considered valid or not, no finer grained error checking is performed. Returned email status code will be either Error or Valid.

  warning
    Address containing warnings is considered valid, that is, any status code below 16 is considered valid.

  error
    Address is invalid for any purpose

  valid
    Address is valid

  dnsWarningNoMXRecord
    Could not find an MX record for this domain but an A-record does exist

  dnsWarningNoRecord
    Could not find an MX record or an A-record for this domain

  rfc5321TopLevelDomain
    Address is valid but at a Top Level Domain

  rfc5321TopLevelDomainNumeric
    Address is valid but the Top Level Domain begins with a number

  rfc5321QuotedString
    Address is valid but contains a quoted string

  rfc5321AddressLiteral
    Address is valid but at a literal address not a domain

  rfc5321IpV6Deprecated
    Address is valid but contains a :: that only elides one zero group

  comment
    Address contains comments

  foldingWhitespace
    Address contains Folding White Space

  deprecatedLocalPart
    The local part is in a deprecated form

  deprecatedFoldingWhitespace
    Address contains an obsolete form of Folding White Space

  deprecatedQuotedText
    A quoted string contains a deprecated character

  deprecatedQuotedPair
    A quoted pair contains a deprecated character

  deprecatedComment
    Address contains a comment in a position that is deprecated

  deprecatedCommentText
    A comment contains a deprecated character

  deprecatedCommentFoldingWhitespaceNearAt
    Address contains a comment or Folding White Space around the @ sign

  rfc5322Domain
    Address is RFC 5322 compliant but contains domain characters that are not allowed by DNS

  rfc5322TooLong
    Address is too long

  rfc5322LocalTooLong
    The local part of the address is too long

  rfc5322DomainTooLong
    The domain part is too long

  rfc5322LabelTooLong
    The domain part contains an element that is too long

  rfc5322DomainLiteral
    The domain literal is not a valid RFC 5321 address literal

  rfc5322DomainLiteralObsoleteText
    The domain literal is not a valid RFC 5321 address literal and it contains obsolete characters

  rfc5322IpV6GroupCount
    The IPv6 literal address contains the wrong number of groups

  rfc5322IpV6TooManyDoubleColons
    The IPv6 literal address contains too many :: sequences

  rfc5322IpV6BadChar
    The IPv6 address contains an illegal group of characters

  rfc5322IpV6MaxGroups
    The IPv6 address has too many groups

  rfc5322IpV6ColonStart
    IPv6 address starts with a single colon

  rfc5322IpV6ColonEnd
    IPv6 address ends with a single colon

  errorExpectingDomainText
    A domain literal contains a character that is not allowed

  errorNoLocalPart
    Address has no local part

  errorNoDomain
    Address has no domain part

  errorConsecutiveDots
    The address may not contain consecutive dots

  errorTextAfterCommentFoldingWhitespace
    Address contains text after a comment or Folding White Space

  errorTextAfterQuotedString
    Address contains text after a quoted string

  errorTextAfterDomainLiteral
    Extra characters were found after the end of the domain literal

  errorExpectingQuotedPair
    The address contains a character that is not allowed in a quoted pair

  errorExpectingText
    Address contains a character that is not allowed

  errorExpectingQuotedText
    A quoted string contains a character that is not allowed

  errorExpectingCommentText
    A comment contains a character that is not allowed

  errorBackslashEnd
    The address cannot end with a backslash

  errorDotStart
    Neither part of the address may begin with a dot

  errorDotEnd
    Neither part of the address may end with a dot

  errorDomainHyphenStart
    A domain or subdomain cannot begin with a hyphen

  errorDomainHyphenEnd
    A domain or subdomain cannot end with a hyphen

  errorUnclosedQuotedString
    Unclosed quoted string

  errorUnclosedComment
    Unclosed comment

  errorUnclosedDomainLiteral
    Domain literal is missing its closing bracket

  errorFoldingWhitespaceCrflX2
    Folding White Space contains consecutive CRLF sequences

  errorFoldingWhitespaceCrLfEnd
    Folding White Space ends with a CRLF sequence

  errorCrNoLf
    Address contains a carriage return that is not followed by a line feed

Dominic Sayers, Jacob Carlborg 2008-. Test schema documentation: Copyright © 2011, Daniel Marschall | Page generated by Ddoc.