550 5.7.1 Authentication Required Error (Verizon DSL)

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  • 1. Changing the position of the message window to open on the right
    Some months ago I must have changed the settings of Eudora in such a way that new messages now open to screen left, which places them behind the mailbox list and advertising box. Of course I can drag them to the right, but I would prefer my previous setting. How can I change this so that a message will automatically open on the right. I'm using Eudora 7 for Windows. Have looked at Eudora.ini, but don't see an obvious configuration change that I could make. A search of this newsgroup's archives suggests that the question has come up previously, but previous suggestions don't seem to help me. For example, deleting Commercial32Version=16 doesn't change anything. My mailbox list is set to allow docking and says "Mailboxes" in the title bar. If I double-click on that, the mailbox list takes over the entire screen. I then have to reverse that by allowing the mailbox window to float - until I check the "allow docking" menu item again. Any suggestions would be appreciated..
  • 2. "550 permit denied" error message
    Hi. I use Eudora with Comcast internet service. For some strange reason I can't send email to one person to whom I've written before. When I try to send him a message, I get a "550 permit denied" message. All my other emails work, sending out and receiving. What's up with this? Is this an Eurdora or a Comcast problem? Thanks.
  • 3. Eudora and MSGTAG2
    EP v7 paid Has anyone gotten the two to get along? I've been working on it for three days now and I'm getting quite close to giving up. After installing MSGTAG and configuring two email accounts, I changed the smtp server to 'localhost' as MSGTAG stated. When I attempt to send email, Eudora gives me this error message: '550 5.7.1 Unable to relay for XXXX@XXXXX.COM ' Anyone with some thoughts for me? -- **:::::>>::*=3F`?3F?3F`*::<<:::::** .~ zZ=3F WL ~. **:::::>>::*=3F`?3F?3F`*::<<:::::** { WrOnG NuMbEr RoCoCcO, yOu .~ zZ=3F WL ~.
  • 4. Yet Another Eudora v7 Exception Crash
    Thu Dec 01 19:59:58 2005 Eudora.exe caused an EXCEPTION_INVALID_HANDLE in module ntdll.dll at 001B:7C964ED1, RtlRaiseStatus()+0038 byte(s) Registers: EAX=0525FE84 EBX=00000000 ECX=0525FECC EDX=7C90EB94 ESI=04BC34C8 EDI=00000000 EBP=0525FED4 ESP=0525FE84 EIP=7C964ED1 FLG=00000246 CS=001B DS=0023 SS=0023 ES=0023 FS=003B GS=0000 Call stack (CrashFinder): Address 7C964ED1 7C94243C 7C90104B 71A5D8E3 71A5D62C 7C80B50B Call stack (Extended Info): Address Possible Params Location 001B:7C964ED1 (0xC0000008 0xFFFFFFFF 0x04BC34C8 0x00000000) ntdll.dll, RtlRaiseStatus()+0038 byte(s) 001B:7C94243C (0x00BC34C8 0x00000000 0x71A67A3F 0x00000000) ntdll.dll, RtlInitializeSListHead()+37932 byte(s) 001B:7C90104B (0x04BC3C38 0x00000000 0x0525FFA4 0x00000000) ntdll.dll, RtlEnterCriticalSection()+0070 byte(s) 001B:71A5D8E3 (0x71A67A25 0x00000000 0x04BC3C38 0x00000000) mswsock.dll, WSPStartup()+5512 byte(s) 001B:71A5D62C (0x71A67A25 0x00000000 0x0515F8D4 0x00000000) mswsock.dll, WSPStartup()+4817 byte(s) 001B:7C80B50B (0x71A5D5AF 0x00000000 0x001D3D30 0x00000000) kernel32.dll, GetModuleFileNameA()+0436 byte(s)

550 5.7.1 Authentication Required Error (Verizon DSL)

Postby frank1492 » Wed, 19 Nov 2008 00:04:19 GMT

As noted earlier, this just came out of the blue. No settings were
changed that I know of. I can't send anything, but mail is received
just fine.
     Has anyone had this happen and do you know of a cure?
Mozilla Thunderbird has no problems sending.
     Help much appreciated.

Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby Allie » Wed, 19 Nov 2008 00:34:23 GMT

Do you have your "use name and password" checked under Tools -> Account 
Settings -> Outgoing Server(SMTP) -> Edit?  It could be that Verizon 
changed their settings.

I don't see the rest of the thread here, so perhaps i've missed some 
history.  If so, please excuse my post.

Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby John H Meyers » Wed, 19 Nov 2008 07:21:02 GMT

In Thunderbird, for the Verizon SMTP server that you are actually using,
what are these settings:

Server name: ?
Port: ?
Use secure connection: [which choice?]
Use name and password [is it checked?]

Now look at the "Properties" of the personality in Eudora
which you are using to send mail (right-click the personality icon
in the "Personalities" tool window to get to the "properties").

Is the SMTP server name the same?

Is the "secure connection" choice made in Thunderbird
the same as the "Secure Sockets when Sending" choice in Eudora?
(it's the same four choices, and same default port for each)

Does Verizon use port 587?
Does this match your "Use...587" choice in Eudora?

Is "Allow authentication" check-marked in Eudora? (should be)

Is the user name associated with your Eudora personality
(the one sending mail) the exact same user name you gave to Thunderbird?


Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby frank1492 » Thu, 20 Nov 2008 13:12:29 GMT

Thank you both. I have just returned from a trip and will check these
settings tomorrow.
     I hope your ideas will help, but I will point out two things:
(1) In the past I experienced *intermittent* authentication errors.
These generally occurred with complex e-mails (forwards with
mixed fonts, for example) or those with large attachments. This
 is the first time the problem has been indefinite and applying to
even the simplest test messages. 
(2) I downloaded Thunderbird when Eudora wouldn't work,
and I did an automatic transfer of Eudora settings at the time,
so I wouldn't think the setttings in the two could differ but I
will check.
     Thanks again for your interest. I'll be back soon.

On Mon, 17 Nov 2008 10:34:23 -0500, Allie < XXXX@XXXXX.COM >

Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby Allie » Thu, 20 Nov 2008 22:38:38 GMT

good luck.  the only thing i can think of that would be giving you those 
problems is some sort of timeout, or something like that.  strange.  You 
can also play with the smtp submission port too - you can try port 587 
instead of the default 25.  But that's just a shot in the dark. 
Finally, if you have access to a different SMTP server, you can set that 
one up instead of verizon's.

Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby Froggie the Gremlin » Fri, 21 Nov 2008 09:36:58 GMT

On Wed, 19 Nov 2008 08:38:38 -0500, Allie < XXXX@XXXXX.COM > wrotd:

There's been a lot of discussion (no solutions yet) in the local Verizon
groups about these intermittent authentication errors.  Although I'm a VZ
user, I dumped their email (not for this reason) about 2-mo. after I signed
up for their service a few years back.  It was just too intermittent and
very flakey... especially black hole emails (both OUT and IN).


Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby frank1492 » Sat, 22 Nov 2008 04:03:56 GMT

Could you show me where to look for this discussion??? I am most
interested to see what others are experiencing. The problem, once
intermittent, now appears permanent. I need help from others.
    Note that switching my email programs (Thunderbird) seems to
have solved the problem.

On Wed, 19 Nov 2008 19:36:58 -0500, Froggie the Gremlin

Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby Jerry Wolf » Thu, 04 Dec 2008 13:47:18 GMT

> Note that switching my email programs (Thunderbird) seems to>
> have solved the problem.>
> Frank


Re: 550 5.7.1 Authentication Required Error (Verizon DSL)

Postby John H Meyers » Thu, 04 Dec 2008 14:22:38 GMT

Jerry Wolf's post elsewhere

Note, however, that the error which "frank1492" is reporting
(which is the "Subject" of this thread)
is while _sending_ via SMTP,
whereas the error which Jerry Wolf is reporting
is while _receiving_ via POP.

Sometimes the outgoing (sending, SMTP) errors occur because of
not even marking "Allow authentication" (something which you can't forget
for POP, because there's no such thing as POP without authenticating),
or because of the SMTP server in a given personality
having a different username/password than the POP server
(this requires telling the POP personality to get its SMTP info
 from a different "relay" personality while sending mail).

If the specific error (as may be revealed by a log)
happens to be in the same area as Jerry's
(authentication using CRAM-MD5),
then one might try telling Eudora not to use CRAM-MD5
(this will apply both to POP and SMTP,
so perhaps it will cure two separate diseases at the same time :)

Paste the following into a new message in Windows Eudora
and click on the resulting highlighted "link"
while pressing ALT on keyboard, then click OK:


Further info:

  "I'm nobody! Who are you?
   Are you nobody, too?
   Then there's a pair of us -- don't tell!
   They'd banish us, you know."



Similar Threads:

1.#5.1.0 smtp;550 5.1.0 Authentication required

I'm a novice MCSE. On the side I'm supporting a small network (SBS - 3 
workstations - Exchange).  The small network was built nicely by a networking 
company who became too expensive for my client, who is a friend, who asked me 
to support it.

The first Thing (and only thing) I've done was changed the Administrator 
Password on the server.

Now I've had reports of this error when users try to reply to emails.

 The e-mail address could not be found. Perhaps the recipient moved to a 
different e-mail organization, or there was a mistake in the address. Check 
the address and try again.
  <mydomain.com #5.1.0 smtp;550 5.1.0 Authentication required

They can email successfully if they type out the email address, but it will 
not work when they simply hit reply and send.

Does anyone know what I can try to do to fix this?


Joel B smtp;550 Authentication required

3.550 Authentication required

Just today when trying to send email I started receiving this message,
I contacted my IP, Peoplepc and they say that I need a code to correct

Delivery has failed on the enclosed message for the following reasons
reported either by

the mail delivery system on the mail relay host or by the local TCP/IP
transport module:

550 Authentication required



4.What are 550 & 553 errors, Verizon says they are Eudora codes

According to Verizon, the error coded 550 & 553 are Eudora's codes and
not Verizon codes.

It occurs when trying to send mail accessing a Verizon smtp server, 

I get a smilar message when trying to send to the same account using a
different IP smtp server.

I can send to and from within Verizon's Net mail but not when using

Am using 6.2paid, WinME, Norton Anti, Z A firewall (both norton and ZA
have been shut down and the error still occurs.) K6 450MHz, 256meg

This started after updating to several weeks ago, the problem
may have been there for a while, just noticed it Wednesday. 

Just can't get consistant responses to narrow down the field of

Thanks in advace,

5.550 Authentication Error

I'm trying to use Eudora to send and receive email from an account other
than my ISP. In Outlook I can do this by setting my outgoing mail server to
my ISP server and then selecting the "My outgoing server requires
authentication" option. This prompts me for the user name and password for
for my ISP account.

With Eudora, under Getting Started, I can select Allow Authentication but I
am never asked for a user name and password. I recieve the "550 relaying
mail to <domain name> is not allowed" error.


6. 550 Authentication turned on in your email client

7. 550 authentication...

8. Win 2K: Error 769 w/Verizon DSL

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