This rejection is the result of the "percent hack" implimented on sendmail, postfix and, perhaps, other mail servers.
Nothing to do with Mutt. On Fri, Oct 26, 2018 at 08:23:22PM +0200, Matthias Apitz wrote: > > Hello, > > This is perhaps not a problem with mutt itself, but maybe some expert can > lend me a light. > > I'm member of a group and as this I do receive mails sent by others to the > addr > jw%leserini-...@gmx.de. But when I reply, the mail gets rejected, see > below. How is this possible that the originator can send this mail to > jw%leserini-...@gmx.de > but I can not? > > Thanks > > matthias > > ----- Forwarded message from Mail Delivery System > <mailer-dae...@sh4-5.1blu.de> ----- > > Date: Fri, 26 Oct 2018 14:51:58 +0200 > From: Mail Delivery System <mailer-dae...@sh4-5.1blu.de> > To: g...@unixarea.de > Subject: Mail delivery failed: returning message to sender > > This message was created automatically by mail delivery software. > > A message that you sent could not be delivered to one or more of its > recipients. This is a permanent error. The following address(es) failed: > > jw%leserini-...@gmx.de > host 172.16.28.206 [172.16.28.206] > SMTP error from remote mail server after RCPT TO:<jw%leserini-...@gmx.de>: > 550 restricted characters in address > > Reporting-MTA: dns; sh4-5.1blu.de > > Action: failed > Final-Recipient: rfc822;jw%leserini-...@gmx.de > Status: 5.0.0 > Remote-MTA: dns; 172.16.28.206 > Diagnostic-Code: smtp; 550 restricted characters in address > > Date: Fri, 26 Oct 2018 14:51:57 +0200 > From: Matthias Apitz <g...@unixarea.de> > To: ... > Cc: jw%leserini-...@gmx.de > Subject: Re: Literaturmesse N??rnberg > > > Hallo, > > wie ist denn die R??ckfahrt geplant. Wir k??nnen doch nur alle zusammen > mit dem Bayernticket fahren... > > Gruss > > matthias > -- Hokan Bicyclist Sysadmin