Cannot Send Email when Tethering through Huawei P10 Mobile Phone

[#1]

Can somebody suggest why I cannot send emails from my desktop computer when connected to the internet by tethering through my Huawei P10 mobile phone, please?

I use the email program Pegasus on my desktop Windows 10 computer for sending and receiving email.  It is Pop3 and I use the <mail.plus.net> setting for receiving emails and the <relay.plus.net> setting for sending emails, and this has been working for many years without any problems when I connect direct to the internet through my Plusnet account.

I have recently been having broadband connection problems and have used the tethering option on my Huawei P10 mobile phone to enable my desktop computer to connect to the internet.  When I do this, I can still download my emails, but cannot send them.  The program returns the following:

07:35:30.032: --- 14 Sep 2021, 7:35:30.032 ---
07:35:30.032: Connect to 'relay.plus.net', timeout 30 seconds.
07:35:31.535: >> 220 avasout06 smtp relay.plus.net
07:35:31.536: << EHLO [192.168.43.134]
07:35:31.567: >> 250-avasout06 hello [213.205.194.3], pleased to meet you
07:35:31.567: >> 250-HELP

Can someone tell me what this means, please, and if there is a different setting I have to use when sending emails whilst connected to the internet through my mobile phone?

Thanks for any help and / or advice.

[#2]

Moderators Note

This topic has been released from the spam filter.

[#3]

Thank you, but why was my post treated as spam, please?

[#4]

I have just realised that although my original post is saying the problem has been fixed, it has not!  The fix only applies to the post being treated as spam, I still don't have the answer(s) to my original post question(s).

Thanks again for any help and / or advice.

[#5 · Accepted solution]

@G4BUE  when not using your Plusnet connection, you will need to specify authentication on the outgoing (smtp) server. Use the same username/password that you use on the incoming server. Authentication will work with both PlsuNet and non-plusnet connections so you can leave it configured.

[#6]

Many thanks for your help, MisterW, but I don't understand how to "specify authentication on the outgoing (smtp) server",  Can you explain how to do that, please?

[#7]

As you were MisterW.  I have just worked out how to configure it in my Pegasus email program, and I am now able to send emails while tethering to the internet through my mobile phone.

A big thank you for your help.

[#8]

Moderators Note

This topic has been moved from Mobile to eMail