> Hi,
>
> I am running Pegasus Mail v4.41 on Win XP and have for some days
> troubles in sending Mails. Receiving mails works (sending and
> receiving mails using the webmail-interface is ok also).
>
> After sending a new mail I get a window with the error "Incorrect
> authentication data" and shortly after that I get the message back
> with "Mail Delivery Failure - 535 Incorrect authentication data".
>
> I contacted my ISP to make sure to use the right server, port, login
> name and password (login name and password are the same for the
> webmail-interface and there it works). I also sent them the
> connection log. They told me a) to use SMTP Authentication and b) to
> disable CRAM-MD5-Encryption.

The problem is you cannot disable the CRAM-MD5 authentication, they must be the ones to do this.  David Harris has implemented ESMTP AUTH CRAM-MD5 for WinPMail, Mercury and Mercury/32.  They do a SMTP authentication in accordance with RFCs 2554 and 2195.  Mercury and Mercury/32 also do the LOGIN and the strange MS AUTH=LOGIN.  The program will always use the most secure method offered by the server.  

Talk to your ISP again and ask them why they are offering CRAM-MD5 at the server when they do not support it.

>
> I activated the SMTP Authentication with <username> and <password>
> but I still get the error.
>
> Now I don't know how to disable CRAM-MD5-Encryption. Is it possible?
> If so, how? If not, what else can I try?
>
> I searched the forum - especially for "535" and for "CRAM-MD5" but I
> couldn't get an answer that works for me.
>
> Can anyone give me some helpful advice?
>
> Thank you very much,
>
> Peter
>
>

Hi,

I am running Pegasus Mail v4.41 on Win XP and have for some days troubles in sending Mails. Receiving mails works (sending and receiving mails using the webmail-interface is ok also).

After sending a new mail I get a window with the error "Incorrect authentication data" and shortly after that I get the message back with "Mail Delivery Failure - 535 Incorrect authentication data".

I contacted my ISP to make sure to use the right server, port, login name and password (login name and password are the same for the webmail-interface and there it works). I also sent them the connection log. They told me a) to use SMTP Authentication and b) to disable CRAM-MD5-Encryption.

I activated the SMTP Authentication with <username> and <password> but I still get the error.

Now I don't know how to disable CRAM-MD5-Encryption. Is it possible? If so, how? If not, what else can I try?

I searched the forum - especially for "535" and for "CRAM-MD5" but I couldn't get an answer that works for me.

Can anyone give me some helpful advice?

Thank you very much,

Peter