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Telefonica SMTP Authentication (Spain)

Posted on 2008-10-18
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Last Modified: 2013-11-30
I'm setting our email server in Spain and have a Telefonica ADSL account. The POP3 side is working fine however SMTP requires authentication. I've been sent a username and password and I believe their relay server is smtp.telefonica.net

I have now tried several combinations of username + password but always get back error 535. Some literature I have found suggests username@telefonica.net and other says username$telefonica.net

(I have set up the router directly using IP 192.168.1.1 rather than using the Spanish CD. Could there be some check between the username in the router and the Telefonica smtp that doesn't tally?)
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Question by:ChrisJonesLycos
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by:larsga
ID: 22753446
The details on setting up SMTP authentication depends on the particular ISP.

I found http://www.telefonicaonline.com/on/pub/servicios/onTOEntrada/0,,entrada%2Batc_stya_internet%2Bv_segmento%2BAHOG%2Bv_idioma%2Bes%2Bmenu_izq%2B2%2Bnodo_izq%2B1%2Bmenu_cab_sup%2BCliente%2BambitoAcceso%2Bpub,00.html?v_segmento=AHOG&v_idioma=es which seems to be Telefonica's step-by-step for setting up email in Outlook Express, and http://www.telefonicaonline.com/on/pub/servicios/onTOEntrada/0,,entrada%2Batc_stya_internet%2Bv_segmento%2BAHOG%2Bv_idioma%2Bes%2Bmenu_izq%2B2%2Bnodo_izq%2B1%2Bmenu_cab_sup%2BCliente%2BambitoAcceso%2Bpub,00.html?v_segmento=AHOG&v_idioma=es for general information.

As far as I can understand from the above, you should use the same username/password for POP3 as you do for SMTP. If POP3 is working correctly, you should have the correct username/password. (username is with a $ according to the link above).

You can use http://babelfish.yahoo.com to translate the above pages if needed.
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by:larsga
ID: 22753453
Oops, seems like the Telefonica website likes to hide direct links to their pages.

http://www.telefonicaonline.com/on/io/es/atencion/soporte_tecnico_y_averias/internet/internet/correo/correo.htm should be the correct link for instructions on setting up email.
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by:ChrisJonesLycos
ID: 22755961
We don't use the Telefonica POP3.

The router requires:
User "adslppp@telefonicanetpa"  +  Pswd "adslppp"

Separately they've sent me the following info by post:
User "jo02im**"  + Pswd "317me**"

I've read all the telefonica literature and tried all combinations of username
"jo02im**"   "jo02im**@telefonica.net"   "jo02im**$telefonica.net"
with both passwords

Obviously I'm missing something but don't know what.

Thanks
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larsga earned 500 total points
ID: 22760486
I must say, this is a real headscratcher.

This is rather far fetched, but unless you have wrong username/password (and it sounds like you have double and triple-checked that) I can think of only one thing that it might be.

There have historically been several ways to do SMTP authentication. The backstory is that SMTP servers used to allow mail forwarding without authentication, what we call an "open relay". Spammers abused this, so there was a need to lock them down. One of the solutions was called "POP before SMTP"[1], which in short was that an ISP's SMTP server would deny email forwarding unless it had recently seen a successful POP authentication from you. Most ISPs dropped this way of doing authentication when most mail clients/servers had been updated to support SMTP-AUTH[2] authentication.

[1] http://en.wikipedia.org/wiki/POP_before_SMTP
[2] http://en.wikipedia.org/wiki/SMTP-AUTH
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Author Comment

by:ChrisJonesLycos
ID: 22765126
Sounds worth a try. I'll set up a sample email using their POP3 and see if that helps. Will let you know what result.
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Author Comment

by:ChrisJonesLycos
ID: 22766807
Hi larsqa

Well you were three quarters right on that one. I tried to use their POP3 but it immediately forced me to change the username and password. Using the new username and password in the SMTP it all works fine.

For anyone trying this in future, all I can suggest is you follow all the telefonica instructions by the letter even though you're not planning on using any of the facilities they're offering.
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