Possibly. I use Outlook as my mail client and did select "Plain Text" for both e-mail attempts. The error message implied it was the sending e-mail address (paul_d_smith@xxxxxxxxxxx) that it didn't like, not the e-mail itself. Regards, Paul DS. -----Original Message----- From: Konstantin Khomoutov <kostix@xxxxxxxx> Sent: 07 February 2020 11:30 To: paul@xxxxxxxxxxxxxxxxx Cc: git@xxxxxxxxxxxxxxx Subject: Re: Support 'help' for custom/alias commands On Fri, Feb 07, 2020 at 10:42:56AM -0000, paul@xxxxxxxxxxxxxxxxx wrote: [...] > P.S. I have a perfectly respectable e-mail address at > paul_d_smith@xxxxxxxxxxx which I have used for years - why won't you > accept e-mails from it? The filters at vger.kernel.org do not allow mails which contain text/html parts (mails which contain _only_ them are surely dropped; not sure about mails with multipart/alternative, which do contain a text/plain counterpart). Was this the case?