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jENNIP40
Beginner
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Message 1 of 4

outlook express error message - can receive but not send email

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This is driving me crazy :-O.

 

I can receive but not send emails although I can send blank ones to myself. Everything is working fine on BTYAHOO and to mymobile but not in outlook. Have checked and re checked my settings and they are fine. Really need this fixed. Can anyone help.............and you'll need to keep it simple!!!

 

An unknown error has occurred. Subject 'Marquee hire', 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

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Distinguished Guru
Distinguished Guru
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Message 2 of 4

Re: outlook express error message - can receive but not send email

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Something similar happened to me some time ago and I had to change the outgoing port to 587. Same on my smartphone. It may be a long shot but it's worth a try.

 

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jENNIP40
Beginner
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Message 3 of 4

Re: outlook express error message - can receive but not send email

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You're a genius. Thank you. I've been trawling the internet looking for the solution for weeks. Organising a wedding is not easy when you can't respond to emails!! Thanks again Woman Very Happy

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Distinguished Guru
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Message 4 of 4

Re: outlook express error message - can receive but not send email

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@jENNIP40 wrote:

This is driving me crazy :-O.

 

I can receive but not send emails although I can send blank ones to myself. Everything is working fine on BTYAHOO and to mymobile but not in outlook. Have checked and re checked my settings and they are fine. Really need this fixed. Can anyone help.............and you'll need to keep it simple!!!

 

An unknown error has occurred. Subject 'Marquee hire', 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


Hi. Welcome to the forums.

 

What anti virus product do you have ? Is it AVG ?

 

There is an option on outgoing mail in AVG to scan emails - turn that off.

 

 

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