On Mon, 8 Jun 2020 at 09:54, Forums <for...@mehl-family.fr> wrote: > Hello all. > > Sorry for my english I'm french. > > I have a private mail server (at home) with my domain name. > > I have about 5% of my emails rejected by some SMTP servers for the > following reasons: > > - rDNS is KO (my french provider don't give us possibility to create or > modify our rDNS) > > Or > > - mail server IP comes from a dynamic pool IP (but my IP is static) > > So, my idea is to use automatically (managed by Postfix) an alternative > SMTP server (Gmail SMTP with my Google account) when an email is > rejected. But I don't know if it's possible and how to configure that. >
I don't think you can send through Gmail smtp using your own domain name on the From header unless you have GSuite, but you can do it with a free low-volume account at Sendgrid. I am not sure about relaying in the event of rejection, someone else can maybe advise. Alternatively, and assuming your volumes are low, you could just relay all your outgoing mails through [Sendgrid or another].
