On Mon, Nov 13, 2017 at 10:57 AM, Rich Shepard <rshep...@appl-ecosys.com> wrote: > On Mon, 13 Nov 2017, Simon Matthews wrote: > >> I would hazard a guess that your outbound email packets are being dropped >> somewhere. Try using telnet on your mail server to connect to port 25 of >> the remote mail server (mail.appl-ecosys.com.) and see what happens. > > > Simon, > > I can telnet to port 25 of this desktop server/workstation.
That's not what I asked. > >> You may have to have a list of domains that you continue to relay >> through your ISP's mail server. You would do this with a transport >> map. > > > I don't relay outbound mail any longer. Frontier Communications opens Port > 25 by default on business accounts, and some messages are delivered. Just because your ISP isn't blocking outgoing port 25 doesn't mean that the recipient mail server is accepting connections from your mail server. I have a virtual machine that is hosted in a datacenter and I find that some remote mail servers will not talk to it. Simon
