Invalid local-part at offset 0

Hello,

I am getting just another error with “Invalid local-part at offset 0” Using the code:

public class EnvelopeShould
{
    [Fact]
    public void Parse()
    {
        var rawEnvelope =
            "(\"Tue, 23 Dec 2014 17:03:26 +0100\" \" Merry Christmas!\" ((\"Firstname LastName\" NIL \"f.lastname\" \"ex.com\")) ((\"Firstname LastName\" NIL \"f.lastname\" \"ex.com\")) ((\"Firstname LastName\" NIL \"f.lastname\" \"ex.com\")) ((NIL NIL \"\" \"localhost\")) NIL NIL NIL \"<[e-mail]>\")";

        var parsed = Envelope.TryParse(rawEnvelope, out var envelope);
        Assert.True(parsed);
    }
}

Seems like this part is making issue: ((NIL NIL "" "localhost"))

if I change it to ((NIL NIL "localhost" "localhost"))

it works fine… however have no idea about details here. Envelope is received from IMAP server. Any advice?

[jstedfast]

okay, thanks, I see what is happening…

[mantasaudickas]

Actually we have the same error from 2 clients:

("Wed, 04 Nov 2015 03:44:46 +0000" "Daily Digest | Nov 3, 2015" (("SumAll" NIL "noreply" "sumall.com")) (("SumAll" NIL "noreply" "sumall.com")) (("SumAll" NIL "noreply" "sumall.com")) ((NIL NIL "f.lastname" "userdomain.com")) ((NIL NIL "" "localhost")) ((NIL NIL "" "localhost")) NIL "<[e-mail]>")

and

("Thu, 14 Apr 2016 12:04:00 +0000" "The new season is coming..." (("RAF News" NIL "" "localhost")) NIL NIL NIL NIL NIL NIL "<[e-mail]>")