Contact Forum Editor

Send an email to our Forum Editor:

PLEASE NOTE: Your name is used only to let the Forum Editor know who sent the message. Both your name and email address will not be used for any other purpose.

Tech Helproom

It's free to register, to post a question or to start / join a discussion

View Forum Rules | Contact Forum Editor

 

A problem with Outlook Express

Alf58

Likes # 0

Posted May 29, 2011 at 5:02PM

Can anyone help with my Microsoft Outlook Express. Every time I try to send an email I get the following message:

An unknown error has occurred. Subject :.................. Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: SMTP, Server Response: '451 Invalid Smtp line - Should end with CRLF', Port: 25, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC6A

I have changed the subject to a row of dots for the sake of privacy but the rest of the message remains unchanged. This has started to happen within the last few weeks. At first it was occasional but now it seems to be with every email I try to send. I can receive email with no problems.

Any ideas folks?

Like this post
Alf58

Likes # 0

Posted May 29, 2011 at 5:03PM

Sorry forgot to say I am using Win XP Professional.

Like this post
Zak

Likes # 0

Posted May 29, 2011 at 5:17PM

Have you had a look here:

BTCare Community Forums/Broadband/BB Speed/Connection/email error "Server Response: '451 Invalid Smtp l...

Also:

Mail Server Support

Like this post
Zak

Likes # 0

Posted May 29, 2011 at 5:20PM

Mail Server Support

[ BTCare Community Forums/Broadband/BB Speed/Connection / email error "Server Response: '451 Invalid Smtp l...

]2

Like this post
Alf58

Likes # 0

Posted May 30, 2011 at 12:01PM

I have looked at the thread but am unable to understand it. Also it does not reach any conclusion so I am back to square one.

The only thing I am sure of is that the error is caused by Outlook Express. I use my work laptop at home using Outlook and send and receive mail without problems.

Like this post
lotvic

Likes # 0

Posted May 30, 2011 at 1:20PM

To shed more light on the problem, apparently "It means that the email has not been correctly composed to SMTP (Simple Mail Transfer Protocol) standards. CRLF means carriage-return-line-feed which is the so called "normal" text file line terminator in Microsoft Operating systems (only)" ClickHere and AlsoHere

Like this post
Zak

Likes # 0

Posted May 30, 2011 at 2:03PM

Have you got any messages sitting in your Outbox in Outlook Express?

If yes delete them. It could be one rogue corrupted message causing the problem.

Like this post
Alf58

Likes # 0

Posted May 30, 2011 at 2:07PM

Thanks to all contributors. I'll keep you posted on any changes. I will certainly delete any other suspect messages.

Like this post

Reply to this topic

This thread has been locked.



Check out PC Advisor's other tech forums

Send to a friend

Email this article to a friend or colleague:

PLEASE NOTE: Your name is used only to let the recipient know who sent the story. Both your name and the recipient's name and address will not be used for any other purpose.