> 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: 530-5.5.1 Authentication Required.
You need to turn on authorization. David Harris has implemented ESMTP AUTH CRAM-MD5 for WinPMail. It does a SMTP authentication in accordance with RFCs 2554 and 2195. It will also do the LOGIN and the strange MS AUTH=LOGIN.
Go to Tools | Internet options | (Sending) SMTP, edit the SMTP configuration, select the "Security" tab and then select the SMTP Authorization option as specified by your ISP. Most require the the second or third SMTP Authorization option
There are some ISPs that advertise CRAM-MD5 but do not support it. In this case you should try using v4.5. It has an option to fall back to the less secure options.
Do not use CRAM-MD5 authentication even if it is advertised
The process of logging into the SMTP server to authenticate your identity can take a variety of forms: the server "advertises" the forms it understands, and Pegasus Mail looks through that list, choosing the most secure form it recognizes. Some forms are very "weak", in that they either transmit your credentials as clear text or in a form that can be easily broken, while other forms are "strong", in the sense that it is very difficult to work out your credentials simply by observing the exchange of data between the two programs. Unfortunately, one of the strongest forms of authentication, called CRAM-MD5, is commonly misconfigured on SMTP servers, even at quite reputable ISPs - the server will advertise that it supports it, but will actually fail any attempt to use it. Getting the ISP to realize that they are at fault is a lost cause in most cases - it's almost always easier simply to check this control, which tells Pegasus Mail never to use CRAM-MD5 for this server. You should be aware that you reduce the security of your connection by checking this control: CRAM-MD5 is the only commonly-used authentication form that offers reasonable security, and by disabling it, you force Pegasus Mail to use less secure methods... But sometimes you may decide that being able to send mail is more important than being able to do it securely. The choice is yours.
FWIW, you can find Dawn at http://mysite.verizon.net/zakharin/software/Dawn/
> 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: 530-5.5.1 Authentication Required.
You need to turn on authorization.  David Harris has implemented ESMTP AUTH CRAM-MD5 for WinPMail.  It does a SMTP authentication in accordance with RFCs 2554 and 2195.  It will also do the LOGIN and the strange MS AUTH=LOGIN.
Go to Tools | Internet  options | (Sending) SMTP, edit the SMTP configuration, select the "Security" tab and then select the SMTP Authorization option as specified by your ISP.  Most require the the second or third SMTP Authorization option
There are some ISPs that advertise CRAM-MD5 but do not support it.  In this case you should try using v4.5.  It has an option to fall back to the less secure options.
Do not use CRAM-MD5 authentication even if it is advertised  
The process of logging into the SMTP server to authenticate your identity can take a variety of forms: the server "advertises" the forms it understands, and Pegasus Mail looks through that list, choosing the most secure form it recognizes. Some forms are very "weak", in that they either transmit your credentials as clear text or in a form that can be easily broken, while other forms are "strong", in the sense that it is very difficult to work out your credentials simply by observing the exchange of data between the two programs. Unfortunately, one of the strongest forms of authentication, called CRAM-MD5, is commonly misconfigured on SMTP servers, even at quite reputable ISPs - the server will advertise that it supports it, but will actually fail any attempt to use it. Getting the ISP to realize that they are at fault is a lost cause in most cases - it's almost always easier simply to check this control, which tells Pegasus Mail never to use CRAM-MD5 for this server. You should be aware that you reduce the security of your connection by checking this control: CRAM-MD5 is the only commonly-used authentication form that offers reasonable security, and by disabling it, you force Pegasus Mail to use less secure methods... But sometimes you may decide that being able to send mail is more important than being able to do it securely. The choice is yours.
FWIW, you can find Dawn at http://mysite.verizon.net/zakharin/software/Dawn/
