| SMTPDiagPro | XMail | SmtpTest | Alt-N MDaemon Messaging Server | |
| 1.12 | 1.27 | 1.12.46 | 24.0.1 | |
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| Freeware | Freeware | Freeware | Trialware | Licence |
| FREE | FREE | FREE | $380.00 | Price |
| 1.00 MB | 1.38 MB | 3.90 MB | 316.00 MB | File size |
| Oct 3, 2019 | Nov 17, 2010 | Aug 1, 2024 | Jun 25, 2024 | Update |
| 23 | 25 | 11 | 51 | Downloads |
| Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64 | Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64 | Windows 11, Windows 10 32/64 bit | Windows 7 x64, Windows 8 x64, Windows 10 x64, Windows 11 | OS |
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