Mailbox unavailable. The server response was: Authentication is required for relay

Hi

I receive this error with some domains:
Mailbox unavailable. The server response was: Authentication is required for relay

I have my email information set up fine in admin -> config -> email acc

If I send a test message to an account on the same domain as the store account it work fine

but if i send to a Hotmail or yahoo addresses it fails

with the same credentials I have no problem sending emails to those domains with an email client like Outlook

What could be the problem?


Thanks for the help

Saludos
rubenc

More info:

I have another website in the same server as the store that send emails
is a a forum (yet another forum) and it sends emails successfully

More info:

Version 2.65 sends emails correctly

More info:

Version 2.70 also gives the same error

Anyone is going to be able to help me?

Or should I move down to version 2.65?

I think it has something to do with .net framework 4.5, I dont know, Im going to try to downgrade version 2.70 to .net framework 4.0 and see what happens


Someone please???

Bunch of errors trying to downgrade .NET version... :(

Version 2.65 here I come :(

This is the response I got from support from my hosting company

Hello,

I have tested your mail account and im able to send / receive mails without any issues. Currently we dont have any problems with our mail service. This error message "Authentication is required for relay' means that your application is not using SMTP authentication:

http://portal.smartertools.com/KB/a96/550-authentication-is-required-relay-with-outlook-outlook.aspx

Please check your application configuration once again - login as admin , go to Misc -> Message Templates

You can also check nopCommerce FAQ section for more information how to configure your application properly.
Sincerely,
Eugene S.
Technical Support Team


Go figure

rubenc

Im having a nice conversation with myself here ah?

I'm listening.

SMTP Authentication is hard coded in the source code using the NetworkCredential class.  Your issue is something else.

I would need a little more information about your email account settings.

However,  I strongly recommend using a transactional email service like Mandrill.com.  You get 12k emails per month free and the setup is drop dead simple.  In addition to this you can configure DKIM & SPF keys which keep your sending server from being potentially blackballed or your messages marked as spam.

Check it out.  

t

Hey

What do you need to know about my emails credentials?

I could set you up a testing email account if you want

Hi
Getting the same problem
Version 3.10
Site hosted on winhost.com
Email hosted elsewhere

I have successfully sent test emails to "myself" ie the email user that is set up on the site, but as soon as i send to any other domain i get "Mailbox unavailable. The server response was: Authentication is required for relay"

I have set the site to run in full trust (as suggested in another post)

Any ideas ?

Thanks

UPDATE - all sorted
It was simply the password was wrong - had assumed that because it sent an email to an email addresses on the domain it was working - wrong! Put in the right password - problem solved.