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I have a Telstra Samsung Android Galaxy 9 on Telstra network and Optus NBN at home
To send and receive Optus email at home, its fine on the phone. When I am on Telstra nwtowrk, I can receive but not sent.
I know Telstra blocks port 25 for Optus email. Is there another solution that works in BOTH places, so I dont have to re-do the Outgoing email server settings, as its very annoying each time.
I was always told that it's the outgoing mail server settings that need to match Telstra's outgoing mail server settings.
Incoming should remain as Optus.
You would most likely have the problem in reverse when trying to send mail connected to Optus using Telstra outgoing mail server.
Received: from host.mydomain.com.au
by host.mydomain.com.au with LMTP id 0FgkF53aGFyGNgAA+FwSAQ
for <email@example.com>; Tue, 18 Dec 2018 22:31:41 +1100
Delivery-date: Tue, 18 Dec 2018 22:31:41 +1100
Received: from mail106.syd.optusnet.com.au ([220.127.116.11]:50373)
by host.mydomain.com.au with esmtp (Exim 4.91)
for firstname.lastname@example.org; Tue, 18 Dec 2018 22:31:41 +1100
Received: from [192.168.43.200] (Telstra Internet [18.104.22.168])
(Authenticated sender: email@example.com)
by mail106.syd.optusnet.com.au (Postfix) with ESMTPA id 73FA03CFDBD
for <firstname.lastname@example.org>; Tue, 18 Dec 2018 22:30:50 +1100 (AEDT)
Date: Tue, 18 Dec 2018 22:30:47 +1100
Subject: Test email