outlook XP and ssl problems. Can't connect.

[Jim John <jimjohnlists@xxxxxxxxx>]

Hi. I am using cyrus-sasl + postfix + cyrus. Everything works, except when I change incoming server to SSL on port 993 for IMAP. But I can send using SMTP SSL and I tried imtest, I get
 
 verify error:num=20:unable to get local issuer certificate
 verify error:num=21:unable to verify the first certificate
 TLS connection established: TLSv1 with cipher AES256-SHA (256/256 bits)
 S: * OK test.mail.system Cyrus IMAP4 v2.2.12-Gentoo server ready
 C: C01 CAPABILITY
 S: * CAPABILITY IMAP4 IMAP4rev1 ACL QUOTA LITERAL+ MAILBOX-REFERRALS NAMESPACE UIDPLUS ID NO_ATOMIC_RENAME UNSELECT CHILDREN MULTIAPPEND BINARY SORT THREAD=ORDEREDSUBJECT THREAD=REFERENCES ANNOTATEMORE IDLE AUTH=LOGIN AUTH=PLAIN SASL-IR LISTEXT LIST-SUBSCRIBED X-NETSCAPE
 S: C01 OK Completed
 
 
 And when I try
  openssl s_client -connect test.address.com:993, I get
 
 Verify return code: 21 (unable to verify the first certificate)

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