Hi, Personally I would continue to use your ISP SMTP server to send mail, and just receive mail using POP3 on the Yahoo side. Messages can go out through your ISPs server with the Yahoo address as the mail from address as normal, it just doesn't go through Yahoo. This will cause you no problem. Have you paid them for POP3 access or something? Thanks. Andrew. -----Original Message----- From: access-uk@xxxxxxxxxxxxx on behalf of Douglas Harrison Sent: Wed 30/11/2005 12:52 To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] SMTp authenticatiion As one possible solution to my on-going Yahoo groups problem i created a free Yahoo.co.uk account yesterday and have set it up to give POp3 access via my preferred e-mail client, Pegasus Mail. This works well, but I cannot send mail by SMTp. I get a "530 Authentification Error" each time. Pegasus Mail offers various authentification methods but none seems to work. Yahoo Customer Support say that the problem lies with my ISP, but I have disproved this by installing Eudora which has just a single authentification On/off setting, and with this On outgoing mail is sent normally. Does anyone know what this 530 authentification is? What information is it looking for? Any help would be much appreciated. I would switch all my Yahoo Groups to the new account except that at present I could only reply to messages by using Eudora. Douglas -- Douglas Harrison