Clarification on MailboxAddress.TryParse

[LeeBear35]

In some testing I confirmed that an address can have only the "local" part without the domain information, so it is not a valid Internet Address. My test:

  MimeKit.MailboxAddress mkMailBox = default(MimeKit.MailboxAddress);
  bool actual = MimeKit.MailboxAddress.TryParse("bounty", out mkMailBox);

  Console.WriteLine(mkMailBox);
  Console.WriteLine("Address {0}", mkMailBox.Address);
  Console.WriteLine("Name {0}", mkMailBox.Name);
  Assert.IsTrue(actual, string.Format("Extracted {0}", mkMailBox));

Results:
bounty
Address bounty
Name

I would have expected parsing would have returned False since the domain information is missing.

[jstedfast]

It's accepted because of historical use on Unix systems where you could send a message to a local user w/o specifying a domain.

You can override this behavior by using a ParserOptions with the AllowAddressWithoutDomains set to false.

http://www.mimekit.net/docs/html/P_MimeKit_ParserOptions_AllowAddressesWithoutDomain.htm

[nitinag]

You can also use just postmaster without a domain - SMTP RFC 5321

The reserved mailbox name "postmaster" may be used in a RCPT
command without domain qualification (see Section 4.1.1.3) and
MUST be accepted if so used.
https://tools.ietf.org/html/rfc5321#section-2.3.5

[EvanMulawski]

@jstedfast Even when specifying that parser option, it still returns true for addresses without a domain. Is this a bug (v2.0.1)?

[jjxtra]

It's been a bug for over a year now, has not been fixed, not sure why this issue was closed...