Cisco Bug: CSCvt29230 - ESA: Misbehaviour in TLS Preferred fallback mechanism between DANE Opportunistic and None mode.
Jul 29, 2020
- Cisco Email Security Appliance
Known Affected Releases
Symptom: Misbehaviour in TLS Preferred fallback mechanism between DANE Opportunistic and None mode was noted. The TLS Preferred should fall back to cleartext if there is no STARTTLS and should not when TLS is offered and it failed. SMTP session fallback to cleartext if TLS FAILED and DANE None but not when DANE is in Opportunistic mode. Conditions: N/A
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Bug Details Include
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