core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.
| Software | From | Fixed in |
|---|---|---|
| canarymail / canary_mail | 3.20 | 3.20.x |
| canarymail / canary_mail | 3.21 | 3.21.x |
| libmailcore / mailcore2 | 0.6.4 | 0.6.4.x |