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Unable to send emails over mobile wifi hotspot

jpcook01
Newbie
Posts: 6
Registered: 04-05-2015

Unable to send emails over mobile wifi hotspot

Hello,
I have a frustrating problem in that I often need to use my mobile to create a wifi hotspot for accessing the internet using my laptop when I am in remote locations. In the part this works well and I can receive emails with no problem but sending via thunderbird just won't work. I get a repeated Login failed message despite entering the correct password.
No problem at all when I am connected directly to any other ISP and router. I've tried using the same settings as my mobile for via smtp.plus.net and also the settings I normally use via relay.plus.net but neither will send mails.
This seems to be a problem with Plusnet? How can I resolve it and send emails? Using webmail.plus.net isn't an option so please don't suggest this.
Thanks
14 REPLIES
Community Veteran
Posts: 38,460
Thanks: 1,027
Fixes: 62
Registered: 15-06-2007

Re: Unable to send emails over mobile wifi hotspot

which mobile network are you connected to
pwatson
Rising Star
Posts: 2,468
Thanks: 8
Fixes: 1
Registered: 26-11-2012

Re: Unable to send emails over mobile wifi hotspot

Hi, and welcome to the PN forum.
Sending email via relay.plus.net requires SMTP authentication if you're not using the Plusnet network.  For some reason, the published setup guide turns off authentication in section 8
http://www.plus.net/support/email/setup/thunderbird-setup.shtml
Set it back to Password, Sent Insecurely and try again.
HTH
jpcook01
Newbie
Posts: 6
Registered: 04-05-2015

Re: Unable to send emails over mobile wifi hotspot

Hi,
I have SMTP authentication enabled, hence the reason I can connect OK via any ISP/Router.
My network is orange. I've read that this could be the problem.
If this is the problem what I don't understand is how I can send/receive email ok via plusnet directly from the mobile over 4G using the imap and smtp.plus.net services..
Thanks
Plusnet Help Team
Plusnet Help Team
Posts: 5,330
Thanks: 486
Fixes: 181
Registered: 01-01-2012

Re: Unable to send emails over mobile wifi hotspot

What do you have the SMTP port set as?
If this post resolved your issue please click the 'This fixed my problem' button
 Matthew Wheeler
 Plusnet Help Team
jpcook01
Newbie
Posts: 6
Registered: 04-05-2015

Re: Unable to send emails over mobile wifi hotspot

I have tried 25 and 587 which appear to be defaults?
Plusnet Help Team
Plusnet Help Team
Posts: 1,842
Thanks: 4
Registered: 24-07-2014

Re: Unable to send emails over mobile wifi hotspot

I'd use 25 with relay.plus.net.
For testing purposes, are you using your mailbox (username+mailbox) or just the main account (username) for sending mail?
If this post resolved your issue please click the 'This fixed my problem' button
 Tony T
 Plusnet Help Team
jpcook01
Newbie
Posts: 6
Registered: 04-05-2015

Re: Unable to send emails over mobile wifi hotspot

I've tried both, neither work, both result in the same error.
Moderator
Moderator
Posts: 18,333
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Registered: 11-01-2008

Re: Unable to send emails over mobile wifi hotspot

some providers block port 25
Quote from: Oldjim
which mobile network are you connected to

is a relevant question..

Customer / Moderator / If it helped click the thumb / If it fixed it click 'This fixed my problem'

jpcook01
Newbie
Posts: 6
Registered: 04-05-2015

Re: Unable to send emails over mobile wifi hotspot

I already put which mobile network I'm using.
Quote
My network is orange. I've read that this could be the problem.
If this is the problem what I don't understand is how I can send/receive email ok via plusnet directly from the mobile over 4G using the imap and smtp.plus.net services..
Plusnet Help Team
Plusnet Help Team
Posts: 5,330
Thanks: 486
Fixes: 181
Registered: 01-01-2012

Re: Unable to send emails over mobile wifi hotspot

Do they have any particular restrictions on what you can do while your using your phone as a mobile hotspot?
If this post resolved your issue please click the 'This fixed my problem' button
 Matthew Wheeler
 Plusnet Help Team
pwatson
Rising Star
Posts: 2,468
Thanks: 8
Fixes: 1
Registered: 26-11-2012

Re: Unable to send emails over mobile wifi hotspot

Can you try manually accessing the PN server to see if it is blocked?
The response to 'telnet relay.plus.net 25' and/or 'telnet relay.plus.net 587' will show if it is a fundamental access issue...
jpcook01
Newbie
Posts: 6
Registered: 04-05-2015

Re: Unable to send emails over mobile wifi hotspot

I tried and it connected, this was the response from relay.plus.net
Connected to relay.plus.net.
Escape character is '^]'.
220 avasout02 smtp relay.plus.net

The other port also works..
I think it is related to authentication. But I don't understand why?
pwatson
Rising Star
Posts: 2,468
Thanks: 8
Fixes: 1
Registered: 26-11-2012

Re: Unable to send emails over mobile wifi hotspot

That certainly confirms that the ports aren't blocked. 
I haven't tried it, but there's some instructions here on testing SMTP authentication manually here:
https://www.ndchost.com/wiki/mail/test-smtp-auth-telnet
and a tool to encode your username and password here:
https://www.base64encode.org/
I think you'll need to start ploughing through Thunderbird logs...
Superuser
Superuser
Posts: 9,514
Thanks: 868
Fixes: 53
Registered: 06-04-2007

Re: Unable to send emails over mobile wifi hotspot

The Community Support Library article Testing SMTP Authentication gives instructions for checking authentication on relay.plus.net.
David