Linode blocks port 25 on all new accounts/servers. You need to talk to them and explain who and what you are, before they open it manually for you.
On Thu, 21 Jan 2021 16:29:56 +0000 Gregory Heytings via mailop <mailop@mailop.org> wrote: > How can a server provider do this? Apart from blocking port 25 of course, > and forcing all emails of their customers to go through their SMTP server, > in which case they wouldn't be selling a bare machine anymore. If it was > "not even that difficult", I'd guess they would all do it. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop