It's been suggested to me off-list that if I mention the recipient domains I am having problems with, it might help. They are:
kent.gov.uk seap.org.uk The sender domain is gmail.com. As I said, baffled by how something with valid Gmail DKIM & SPF could be thrown on the floor like this. Steve On Fri, 26 Oct 2018 at 14:18, Steve Dodd <steved...@gmail.com> wrote: > Hope nobody minds a 'civilian' posting here.. > > I switched to using Mailpile (https://www.mailpile.is/) on 1st Oct (but > not enabling any encryption features, etc.) About five days later I started > to have real problems with deliverability to certain recipients on O365. > > I'm using my Gmail account, so messages are still going out through their > servers; SPF and DKIM should therefore be unchanged. > > The recipients in question are people I have been corresponding with for > some time, so I am in their address books and there is a history of them > responding to my messages. Sadly they're non technical and so can't provide > me with any information. > > All the tests I have run with technically minded contacts who happen to > use O365 have been fine, and when I've managed to get a look at the headers > there is nothing untoward flagged that I can see. > > Absolutely baffled and having real problems running my life (O365 seems to > be preferred by UK government departments and services.) I have tried > sending from a Gandi-hosted domain as well, and having similar issues, even > after enabling DKIM. > > Hints and tips gratefully received... > Steve >
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