The appropriate solution along with the problem is discussed in the passage below.
- Authentication
failure: If you are not able to send or receive the mail even after
entering the correct and valid mail address and thus receiving an Error
550, then the possibility of Error lies within SMTP authentication. When
your Email is not configured with SMTP authentication, then in this
case you will receive this error.
In
order to defend the servers from the criminal spammers, the companies
are allowing their own customers only to use it. For this SMTP
authentication is checked and must for the purpose of verification. To
turn on the SMTP authentication follow the below mentioned steps.
- Go to email program settings and turn on the SMTP by clicking on the box that says “My server wants authentication”.
- If
you are using a Microsoft outlook on your PC then this will be done
automatically by just clicking on yes button after this install and run
the program.
- Sending
a mail from false address: You will get server response error or
un-authorized sender Error, when you send a mail from false address. The
recipient will not recognize this address and reject directly due to
falsification in authorized group. So if the sender address is invalid,
the server will block the mail and doesn’t allow you to send it. In such
case, take the following measures.
- The
address from which you are sending a mail must be written correctly
without any character or alphabetical mistake during account setup.
- A Newly setup email takes 24 hours of time to activate on server. So keep this thing in mind while sending an email.
- While
setting up an Email, special characters in username and password must
be taken care of. Any misspelt words may cause this problem.
- Sending
to false address: As we have discussed in the above passage about
sending mail from false address, in the same way you will get error when
you send a mail to a false address. Any change in the domain name or in
the special character results on Error 550 that says unknown local
user. If you are sending a mail from same domain then you will get error
550 but if you are sending from an email suppose from Btinternet to
other, then you will get “delivery status failure notification in your
mail box. To remove this error, go through the below mentioned steps.
- Check the spelling of recipient mail address properly before sending mail to it.
- Ensure that there is no problem with the destination server of your email.
In
case you are still having problem with sending or receiving a messages,
then you can call at official helpline numbers provided on the website.
The expert team members sitting there will guide you properly with easy
steps and accurate information.