How to use relay.plus.net

[#1]

Whilst I've been a Plusnet customer for years, I got a new account 2 years ago when I moved house and went to Full Fibre.

The new account doesn't have a plusnet email address attached to it (unlike my old one).

I've recently been trying to use relay.plus.net for sending a small number of emails for a club I'm involved in.

All attempts to use relay.plus.net result in a "535 Authentication rejected” error even when I authenticate manually using AUTH LOGIN over TLS.

I'm using my broadband user ID   "accountname"@plusdsl.net and my broadband account password.

I tried changing my password to remove "special characters" that relay.plus.net might not like but I still get the 535 error.

Am I doing something wrong?

[#2]

@Bobins99 If your email address is not a Plusnet (or legacy business one), you should be using the SMTP servers of whoever is providing the service. Relay.plus.net is only going to allow authorised users.

Which email provider are you using - e.g. Google/Yahoo/Proton?

[#3]

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@Bobins99 wrote:

Whilst I've been a Plusnet customer for years, I got a new account 2 years ago when I moved house and went to Full Fibre.

The new account doesn't have a plusnet email address attached to it (unlike my old one).

I've recently been trying to use relay.plus.net for sending a small number of emails for a club I'm involved in.

All attempts to use relay.plus.net result in a "535 Authentication rejected” error even when I authenticate manually using AUTH LOGIN over TLS.

I'm using my broadband user ID   "accountname"@plusdsl.net and my broadband account password.

I tried changing my password to remove "special characters" that relay.plus.net might not like but I still get the 535 error.

Am I doing something wrong?

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Depends what you mean by "wrong". AFAICS, from what you have posted above, you are trying to log in to an account that you do not now have. Therefore the authentication fails as intended. I can't think there is much more to say.

[#4]

Your question is unclear in that you do not indicate which account's credentials you are attempting to use - that of the new account from two years ago or the "old one".

the two year old account will not have had the mail component offered as part of the package, so your current credentials are never going to work.  The free email service add on was dropped a long time ago.

As for the "old" account, that hints at an issue arising at the time of the house move.  If requested at the time, there were circumstances where Plusnet would resurrect an old account as a free email-only account.  Did that happen?

Whatever, you appear to be wanting to send "from" some other address (the club's?), therefore you should be using THAT email service's SMTP / relay server, not Plusnet's.  Not being able to login onto the SMTP server would be only the start of your issues: Plusnet's SMTP server is not going to be deemed a valid sender for your club's email address, therefore SPF verification will fail and services such as Gmail are unlikely to accept delivery of the email.

[#5]

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@pvmb wrote:

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@Bobins99 wrote:

I'm using my broadband user ID   "accountname"@plusdsl.net and my broadband account password.

... you are trying to log in to an account that you do not now have.

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@pvmb 

I read that as @Bobins99 is attempting to use their CURRENT account details, which will never have had the rights to use email at all (as they state).  The statement of issue is somewhat ambigious.

[#6]

[email protected]   is not what I have used as a Plusnet email address or SMTP Username,
that looks like the Username for the a/c logon when we had ADSL.

[email protected]    might be an email address if you have a mailbox of that name.

Use the Plusnet Member Centre email admin to see what mailboxes exist :

https://www.plus.net/manage_my_mail/

or www.greenby.com if you a/c has migrated.

But as mentioned above even with valid credentials it is not going to work well if the Plusnet SMTP server
is not the exact one intended for the club's email address .... 

... and then there is the question of how to see the replies  ?

[#7]

Difficult to tell, as the OP hasn't replied, but I am going to stick my neck out and guess they are trying to use the account details to create an email address, which is doomed to fail.

[#8]

Ok I'll try and be clear.

I have my own small mail server on which I receive email successfully for the club domain however, because all Plusnet dynamically assigned broadband IP addresses are blacklisted, I cannot send emails from my email server.

I believed as a Plusnet customer i could use relay.plus.net as the outbound smtp server provided I authenticated to it with my account credentials.

An online search suggested that I would need to authenticate to relay.plus.net using my broadband user ID and password. I have been using the one for my current PN account and Fibre broadband. My broadband user ID is in the format "account username"@plusdsl.net. and a password that matches PN's requirements.

My broadband connects fine with those credentials

I am trying to understand as a PN customer if I can actually use relay.plus.net and if so, why my authentication fails.

[#9]

@Townman  / @PhilipHeyes  I'm sure the OP is wrong in the above post - especially if they use AI-generated answers - but it is getting a bit murky for me, and you guys know more than I do.

[#10]

@Bobins99 

Is there a plus.com email address associated with the @plusdsl.net you are using?

unless there is I can't see how it would work, anyway @plusdsl.net is only used for the broadband username NOT the email/relay address setting. That would  be [email protected]

[#11]

I believe OP is probably using account userid rather than full PN default email address as auth credentials for relay.plus.net

This works as long as the Broadband account being used has email facility which i suspect was the case for original account but that was closed and new account doesnt have email

[#12]

You are possibly correct, @njay - providing of course that they have a valid Plusnet email addy, of course.

EDIT: Just seen your edit.

[#13]

If this works, the OP will be a bulk sender of forged emails, the rejection rate will be exceedingly high
due to SPF DKIM & DMARC not being PASS.

The effect on the Plusnet sender reputation will be negative as this will look like a spam storm.