The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending.
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{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-base" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-base-dbgsym" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-config" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-daemon-heavy" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-daemon-heavy-dbgsym" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-daemon-light" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-daemon-light-dbgsym" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "exim4-dev" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "eximon4" }, { "binary_version": "4.90.1-1ubuntu1.10+esm4", "binary_name": "eximon4-dbgsym" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-base" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-base-dbgsym" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-config" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-daemon-heavy" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-daemon-heavy-dbgsym" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-daemon-light" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-daemon-light-dbgsym" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "exim4-dev" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "eximon4" }, { "binary_version": "4.93-13ubuntu1.11", "binary_name": "eximon4-dbgsym" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-base" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-base-dbgsym" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-config" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-daemon-heavy" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-daemon-heavy-dbgsym" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-daemon-light" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-daemon-light-dbgsym" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "exim4-dev" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "eximon4" }, { "binary_version": "4.95-4ubuntu2.2", "binary_name": "eximon4-dbgsym" } ] }