Hi, On Sun, Dec 29, 2024 at 06:02:33PM +0000, mick.crane wrote: > On 2024-12-29 17:38, Jerome BENOIT wrote: > > You can first place your SMTP server behind a firewall to block the > > undesirable ports. > > Second, your SMTP may allow to specify the port you desire to use. This > > the case with exim4. > > With exim4 you can use certificate as well. > > I'm uncertain who validates the certificate.
As others have mentioned, there are a great many hurdles in place to getting email you send out from your own system to be accepted by the large mailbox providers. They start with "are you able to set matching forward and reverse DNS for your IP address that do not look too 'generic'"? But there are many more after this, including having to have a real domain name of your own whose DNS records you can change in order to add SPF and/or DKIM. So I really wouldn't bother looking into this unless you can do the first one (matching DNS for a static IP) and are prepared for what follows. Most people send email out of their access provider's outbound email servers. Most of the rest who want to send their own email send it through an email service provider that takes care of all that. Only a tiny tiny percentage of people send email out through mail servers that they run themselves. Thanks, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
