Home/ Questions/Q 126515
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-11T05:19:48+00:00

I’m working on an app that’s using System.Net.Mail.MailAddress and friends for sending emails. Does

  • 0

I’m working on an app that’s using System.Net.Mail.MailAddress and friends for sending emails. Does that parser implement the full RFC5322 or a subset or what? The MSDN is not very forthcoming on this topic.

Any hints appreciated.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. I’ve wrote a little snippet to test the function:

    foreach (int i in Enumerable.Range(32,128-32)) {     char c = (char)i;     string addr = String.Format('par.t1{0}pa.r{0}t2@example.com', c);     try     {         var mailAddr = new MailAddress(addr);     }     catch     {         Console.WriteLine('MailAddress failed '{0}' ({1}): {2}', c, i, addr);     } }

    With the following results on 3.5 SP1:

     MailAddress failed ' ' (32): par.t1 pa.r t2@example.com MailAddress failed ''' (34): par.t1'pa.r't2@example.com MailAddress failed '(' (40): par.t1(pa.r(t2@example.com MailAddress failed ')' (41): par.t1)pa.r)t2@example.com MailAddress failed ',' (44): par.t1,pa.r,t2@example.com MailAddress failed ':' (58): par.t1:pa.r:t2@example.com MailAddress failed ';' (59): par.t1;pa.r;t2@example.com MailAddress failed '<' (60): par.t1<pa.r<t2@example.com MailAddress failed '>' (62): par.t1>pa.r>t2@example.com MailAddress failed '@' (64): par.t1@pa.r@t2@example.com MailAddress failed '[' (91): par.t1[pa.r[t2@example.com MailAddress failed '\' (92): par.t1\pa.r\t2@example.com MailAddress failed ']' (93): par.t1]pa.r]t2@example.com MailAddress failed '⌂' (127): par.t1⌂pa.r⌂t2@example.com

    Also it doesn’t seem to support ‘quoted-string’ local-parts, like 'blah'@example.com.

    I don’t think a validator could accept any less before becoming unusable.

    • 0