On 31 March 2018 at 08:24, graham stott wrote: > Guys > HTML used to get bounced from gcc list but now its getting it's not Are you sure? I don't see any HTML or multipart/mixed emails. The spam email you replied to (https://gcc.gnu.org/ml/gcc-help/2018-03/msg00113.html) says it contains HTML, but it doesn't. The SMTP headers are: Content-Type: text/plain Content-Transfer-Encoding: quoted-printable