Postfix keeps coming back with bounced, when I send mail to my ISPs SMTP service

[j.smith1981]

I am having real problems sending emails using my ISPs SMTP service.

 

What I am getting back is exactly this:

Nov 15 09:56:49 server postfix/smtp[18716]: 844E23A6EBC: to=<[email protected]>, relay=smtp.virgin.net[62.254.26.212]:25, delay=0.27, delays=0.09/0.03/0.14/0.02, dsn=5.0.0, status=bounced (host smtp.virgin.net[62.254.26.212] said: 555 Refused (external Mail From address). Please enable SMTP authentication to send mail. (in reply to MAIL FROM command))

 

I have tried the following steps:

http://www.cyberciti.biz/faq/postfix-multiple-isp-accounts-smarthost-smtp-client/

 

But this doesn't work, have replaced the username (email) on the steps with my own ISPs email address (which I won't give out here for obvious reasons) and my current password but still no luck.

 

By doing those steps it just says deffered, can someone help me to overcome this error?

 

I mean surely if I am a registered user on their network I should be able to send emails surely?

 

Any feedbacks greatly appreciated,

Jeremy.

[trq]

If your wanting to use your isp's smtp server, uninstall postfix and install ssmtp. Postfix is overkill.

[j.smith1981]

Postfix is used for iRedmail, would rather get this working using what I have for now.