Windows 7 - Server Error 550; Live Mail Error ID: 0x800CCC78; Mail won't Send

Asked By REMY on 15-Nov-09 03:38 PM
My server error is a little different from everyone elses here so I thought I
would post it.  My mail also receives and does not send.  My computer is
brand new and came loaded by Dell with supposedly compatible McAfee.  When it
expires I will load my subscription of Webroot Spysweeper Antivirus I used on
my now dead XP machine.  I have separate firewall which is also Webroot and I
know how to use Webroot stuff at least but it is not listed as compatible on
the Microsoft Site.  I do not have a backup disk of McAfee and frankly Win 7
has been a nightmare.  I suppose I will just have to experiment.  Lots of
slighty older software is ragingly NOT Win 7 compatible, so I am stuck with
Live Mail which does not work either.

It is comforting to know other people are having the same or similar
problem, but shocking that there is no real acceptable solution-- Just do
away with your virus ware and firewall?!  I have tried all the different SSL
settings, but I will try again as there are apparently "two places" you have
to worry about.  Meanwhile I am fortunate my ISP offers Webmail and that is
where I am sending from for now, and I will keep trying with different
strategies with the virus ware as I have changes coming up in that.

complete error msg (I have hidden my email with x's which displayed as the
correct one):

Subject 'Testing my email'
Server Error: 550
Server: ''
Windows Live Mail Error ID: 0x800CCC78
Protocol: SMTP
Port: 25
Secure(SSL): No

Patrick Palczewski replied to REMY on 15-Nov-09 03:53 PM
You've never been able to send since you bought your computer? The error
message states the address (your email address) is invalid. Check
Tools|Accounts (select your email account and click Properties). On the
Servers tab, at the bottom, make sure the box for "My server requires
authentication is checked. Then click the Settings button and select "Use
same settings as my incoming mail server." Click OK, Apply, OK.


Patrick P.
Michael Santovec replied to REMY on 15-Nov-09 04:18 PM
it is written for Outlook Express, but the WLM settings are similar.

Do you have the My Server Requires Authentication checked as indicated?

The error you are getting means that your ISP does not recognize you as
an authorized sender.


Mike -
Ildhund replied to REMY on 15-Nov-09 04:20 PM
At the risk of stating the obvious, the error message says that an address* is invalid, and RIPE reports no such domain. Your SMTP server
is at*. Perhaps you should check that email address and try

* Only one 'e'
** Two 'e's
Gary VanderMolen \(MS MVP\) replied to REMY on 15-Nov-09 06:27 PM
As another responder already advised you, there is a rather obvious
typo in your email address.

Incidentally, the free Microsoft antivirus and firewall are 100% =
with Windows 7, which is all I use. The other vendors may need some time
to make their products fully compatible.

Gary VanderMolen, Microsoft MVP (Mail)

thought I=20
When it=20
used on=20
Webroot and I=20
compatible on=20
Win 7=20
you have=20
that is=20

Robert Aldwinckle replied to REMY on 16-Nov-09 01:46 AM
You misrepresent a common suggestion by stating it that way.
And I am not really sure what you are referring to by mentioning
firewall anyway.   Essentially the idea is to disable E-mail
scanning if that is enabled, not do anything else with your
AV, unless it is to replace it by something better.

N. Miller replied to REMY on 16-Nov-09 07:48 PM
I just upgraded a computer from 32-bit Windows XP MCE 2005 to 64-bit Windows
7 Home Premium. Compatibility issues of some software have been dealt with:
Belkin Power Management load under compatibility mode; told Windows to load
it as "Windows XP; SP2". Family Treemaker is running as, "Windows 98/ME". A
couple of Netgear drivers (for print server and SAN disk) will not go in, but I
am still working on that. Otherwise, everything I have thrown at Windows 7
has worked.

Running the 64-bit version of Windows Security Essentials. Using the native
Windows 7 firewall behind a router.

Now we get to the heart of things ...

Per the instructions here:

No SSL required. Just check the, "My server requires authentication" box,
and make sure your User Name is your full email address.

~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum
orangecami replied to Patrick Palczewski on 11-Sep-10 08:00 AM
"Patrick Palczewski" wrote:
orangecami replied to Patrick Palczewski on 11-Sep-10 08:04 AM
"Patrick Palczewski" wrote:
Gary VanderMolen replied to orangecami on 11-Sep-10 01:45 PM
In the future, please start a new thread instead of hijacking one =
started by
someone else with a different error message.

When you get that repeated prompt for username and password, click =
which should then produce an error message. Right-click on your error =
copy, then paste it into a reply here. We cannot do much troubleshooting =
the complete error message.

First, test your password by logging in to your provider's webmail.
If that works, it proves you have the correct username and password.

What type of mail account is it, POP, IMAP, or Live/Hotmail?

Which antivirus are you running?
As a minimum, email scanning in the antivirus must be turned off,
although that may not be sufficient to eliminate all bad effects.
In a worst case scenario, your antivirus may need to be uninstalled.

For more on why email scanning in your antivirus is bad, see:

Gary VanderMolen, Microsoft MVP (Mail)

tried to do what u instructed Patrick but now a windows=20
and after I write everything in the box but few seconds=20
on and on...what did I do wrong?=20