Returned mail: see transcript for details

[Mail Delivery Subsystem]

The original message was received at Fri, 19 Aug 2016 11:25:15 +0200
from root at localhost

   ----- The following addresses had permanent fatal errors -----
<pkg-flash-devel at lists.alioth.debian.org>
    (reason: 550 improper use of 8-bit data in message header: message rejected)

   ----- Transcript of session follows -----
... while talking to mail.alioth.debian.org.:
>>> DATA
<<< 550 improper use of 8-bit data in message header: message rejected
554 5.0.0 Service unavailable
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/rfc822-headers
Size: 1249 bytes
Desc: not available
URL: <http://lists.alioth.debian.org/pipermail/pkg-flash-devel/attachments/20160819/9906321a/attachment.bin>