Problem Replying to Emails in Outlook 2003

[Bill Coleman]

I have Outlook 2003 installed on my home computer. I have verizon.net as my
ISP. Starting about 5 months ago, sometimes (I would say about 1 in 3
messages) when I am replying to an email, I get the following error message:

Task 'Mail Account (1) - Sending' reported error (0x800CCC78) : 'Unable to
send the message. Please verify the e-mail address in your account
properties. The server responded: 550 5.7.1 Authentication Required'

Then my email will stay in the outbox and not be delivered. If reopen the
email, "select all" to copy all the text, and create a new email, paste
text, and choose the recipient who sent me the original email, I can send
the reply as a new email. Then I have to delete the original reply sitting
in the outbox.

Also, this problem never occurs when I am creating a new email from scratch,
only when I am replying to an email sent to me.

I called Verizon a while ago about this, and they said it was an Outlook
issue.

Anyone have any suggestions on how to fix this?

Bill Coleman

 

[Brian Tillman]

I have Outlook 2003 installed on my home computer. I have verizon.net
as my ISP. Starting about 5 months ago, sometimes (I would say about
1 in 3 messages) when I am replying to an email, I get the following
error message:
Task 'Mail Account (1) - Sending' reported error (0x800CCC78) :
'Unable to send the message. Please verify the e-mail address in your
account properties. The server responded: 550 5.7.1 Authentication
Required'

So, are you authenticating to the outgoing server like the message says?

Also, this problem never occurs when I am creating a new email from
scratch, only when I am replying to an email sent to me.

Are you running a virus scanner that is scanning mail? Disable it if so.

I called Verizon a while ago about this, and they said it was an
Outlook issue.

Sort of, but they should be smart enough to be able to verify that your
account settings are correct.

 

[Bill Coleman]

So, are you authenticating to the outgoing server like the message says?

Would that be Log On Using Secure Password Authentication?
I'll have to check the computer again when I get home; I'm at work
now. Also, why would it only effect some emails, and not others,
and never effect emails that I send that are not replies
to other folks' emails?

Are you running a virus scanner that is scanning mail? Disable it if so.

I assume you mean outgoing mail. I will check that, but I certainly want
my incoming mail scanned. Again, however, this does not explain why some
replies get this error message and others don't, and why NO email that
I sent out that is not a reply ever gets this error message.

Sort of, but they should be smart enough to be able to verify that your
account settings are correct.

Sounds correct to me.

 

[Brian Tillman]

Would that be Log On Using Secure Password Authentication?

No. Look on the Outgoing Server tab of your account properties page.

I assume you mean outgoing mail. I will check that, but I certainly
want my incoming mail scanned.

No you don't. It does not provide any additional protection beyond what
your on-access scanner already does and can lead to communications problems
between the mail client and server.

 

[Bill Coleman]

Well, you still haven't explained how any of this
only effects certain emails that I reply from....and
I have no problem with incoming mail.

Bill

 

[Brian Tillman]

Well, you still haven't explained how any of this
only effects certain emails that I reply from....and
I have no problem with incoming mail.

I can't explain why it happens, I can only state that many people report
problems similar to yours as a result of it, so it must be an issue.

 

[Jeff Stephenson [MSFT]]

Well, you still haven't explained how any of this
only effects certain emails that I reply from....and
I have no problem with incoming mail.

This could happen if you have multiple mail accounts and the non-default
account is not configured properly. Outlook will send replies on the
account on which the message being replied to was received, which may not
be your default account, whereas new mail will (unless you change the
account on it) be sent on the default account. You need to turn on
authentication for the other account, though, as Brian said.

 

[MDBJ]

dr.tcp
I had the same damn problem for a long time.
everything was fine at home (EXACT same router) &comcast cable modem
but work computer (verizon dsl) always sucked on large emails,
and certain webpages (yahoo mail, some ebay pages)

only way I could get around it would be to take the router out of the loop,
do whatever I needed to that wasn't working, then reconnect the router for
the network.

your mtu setting MUST BE 1492 or lower
I called verizon, they said they only support 1492
get dr.tcp from dslreports.com and set the mtu on your
network cards to 1492
Luck..
(some emails work because they are smaller than the 1492 limit)

 

[MDBJ]

see my other post- but it's packet size, a short reply is small enough...