v0.5.0

What's Changed

• FIX: Allow calling sender.close() multiple times by @martino87r in #59
• ENH: Add pyproject.toml by @Miksus in #68
• ENH: Add Message-ID header by @Miksus in #69
• ENH: Add Date header by @Miksus in #71
• FIX: Capitalized email headers by @Miksus in #70
• ENH: Allow custom headers by @Miksus in #72

New Contributors

• @martino87r made their first contribution in #59

Full Changelog: v0.4.2...v0.5.0