Hi, Depending on your client / server interaction, you might be able to setup an ssh tunnel or a wireguard vpn between client and server, then use localhost:587 for submission, bypassing Crunchbits' firewall.
I see no other reliable way to do it (other than changing providers). pat October 28, 2024 8:02 AM, "Wesley via Postfix-users" <postfix-users@postfix.org> wrote: > That VM provider Crunchbits blocks all traffic to external ports of 25, 587, > 465, 2525 etc. under > this case how the customer can access my mailserver via SMTP for submissions? > > Thanks again. > > On 2024-10-28 14:39, Peter via Postfix-users wrote: > >> On 28/10/24 15:37, Wesley via Postfix-users wrote: >>> Do you know any project which provides HTTP api integrated with >> postfix >>> for sending email ? I >>> ask this is because one of my customers >> has been using the VPS which has >>> all outgoing smtp >>> ports/traffic >> blocked. >> >> You really shouldn't be using the smtp port for submission anyways. > Your >> VPS provider should not >> be blocking ports 587 (submission) or 465 > (submissions) and both are >> appropriate for this. >> If they somehow are blocking those ports just pick a different one and > >> have postfix listen on >> that for submission. >> Note: port 25 (smtp) should really be used for MX communication only > and >> not for relaying mail to >> a submission server. >>> Peter >> _______________________________________________ >> Postfix-users mailing list -- postfix-users@postfix.org >> To unsubscribe send an email to postfix-users-le...@postfix.org > > -- https://wespeng.pages.dev > _______________________________________________ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
