On 2012-04-17 5:16 AM, D Chen dchenusa@yahoo.com wrote:
When tried to set up a new Outlook Express mail acct, the following error encountered:
Your IMAP server wishes to alert you to the following: plaintext authentication not allowed without SSL/TLS, but your client did it anyway.
Ummm... hello? McFly? ;)
You need to configure SSL on Outlook Express (why on gods green earth you are using that is beyond me), as the error plainly says. Until you do this it doesn't matter what you enter for a username/password.
Also, you should be using SSL on port 993, because I'm fairly certain that Outlook Express doesn't support STARTTLS on port 143.
And off topic but in the same vein, for postfix/SMTP relay you should be using the submission port (STARTTLS on port 587) for most clients, but I think Outlook Express again doesn't work with it, so you will need to use the deprecated SSL on port 465 (these two need to be enabled in postfix/master.cf - just uncomment the examples).
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Best regards,
Charles