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SMTP Debug Tool vs Softaken PST Mailbox Converter
Short answer: Pick SMTP Debug Tool if you want 3-in-1 SMTP testing and debugging; pick Softaken PST Mailbox Converter if you want standalone PST conversion to multiple formats. SMTP Debug Tool is free; Softaken PST Mailbox Converter has a free plan.
SMTP Debug ToolTest and debug your SMTP connection. Quickly and for free. 
Softaken PST Mailbox ConverterSoftware for converting Outlook PST files into multiple email clientsWhich to pick
Pick SMTP Debug Tool if you want…
- 3-in-1 SMTP testing and debugging
- SMTP debugging
- A free tool
- Integrations with Amazon SES, SendGrid or Mailgun (on SMTP Debug Tool's list, not Softaken PST Mailbox Converter's)
Pick Softaken PST Mailbox Converter if you want…
- Standalone PST conversion to multiple formats
- Integrations with Office 365, Gmail or Zimbra TGZ (on Softaken PST Mailbox Converter's list, not SMTP Debug Tool's)
Side by side
- What it is
- SMTP Debug Tool:A free web tool to test, proxy, and blackhole SMTP connections with real-time session logs.
- Softaken PST Mailbox Converter:Softaken PST Mailbox Converter converts Outlook PST files to 15+ email, document, contact, and cloud formats without Outlook installed.
- Best for
- SMTP Debug Tool:3-in-1 SMTP testing and debugging
- Softaken PST Mailbox Converter:Standalone PST conversion to multiple formats
- Who it’s for
- SMTP Debug Tool:Developers and engineers who need to debug email sending setups.
- Softaken PST Mailbox Converter:IT admins, email migration specialists, and users needing to export Outlook data.
- Pricing
- SMTP Debug Tool:Free
- Softaken PST Mailbox Converter:Freemium
- Starting price
- SMTP Debug Tool:Free
- Softaken PST Mailbox Converter:—
- Free plan or trial
- SMTP Debug Tool:Free to use
- Softaken PST Mailbox Converter:Free plan (Free Demo) · Free trial
- Plans
- SMTP Debug Tool:—
- Softaken PST Mailbox Converter:Free Demo $0
- Works with
- SMTP Debug Tool:Amazon SES, SendGrid, Mailgun, Sendinblue, Google SMTP, Elastic Email, SMTP2GO, UniOne
- Softaken PST Mailbox Converter:Office 365, Gmail, Zimbra TGZ, Lotus Notes NSF
SMTP Debug Tool features
- SMTP Test. Run a quick SMTP session in the browser and view the full conversation log.
- SMTP Proxy. Log an existing SMTP connection between your app and mail provider for error analysis.
- SMTP Blackhole. Create a safe test session without exposing real credentials, capturing logs only.
- Real-time logs. See live, detailed logs of every SMTP command and response.
- No login required. All core functions are accessible without registration.
- Extended parameters for logged-in users. Add subject, HTML body, and extra headers, and raise hourly limits.
Softaken PST Mailbox Converter features
- Standalone conversion engine. Convert PST files without installing Microsoft Outlook.
- Deep Scan & Recovery. Handles corrupted PST files with dedicated recovery mode.
- Multiple export formats. Export to MBOX, EML, MSG, PDF, HTML, VCF, CSV, IMAP, Office 365, Zimbra TGZ, Lotus Notes NSF and more.
- Password-protected PST support. Convert encrypted PST files by providing the password.
- Selective export & preview. Browse folders, preview items and choose specific emails or contacts to export.
- vCard 4.0 compliance. Exports contacts as VCF with RFC 6350 vCard 4.0 standard.
- Multi-language UI. Interface supports languages including Korean, Japanese, Chinese and others.
- OAuth 2.0 authentication. Secure upload to IMAP/Gmail/Office 365 without storing credentials.
SMTP Debug Tool vs Softaken PST Mailbox Converter FAQ
What is the difference between SMTP Debug Tool and Softaken PST Mailbox Converter?+
SMTP Debug Tool: Tests SMTP connections, not PST file conversion.
Should I use SMTP Debug Tool or Softaken PST Mailbox Converter?+
Pick SMTP Debug Tool if you want 3-in-1 SMTP testing and debugging, SMTP debugging or a free tool. Pick Softaken PST Mailbox Converter if you want standalone PST conversion to multiple formats or integrations with Office 365, Gmail or Zimbra TGZ (on Softaken PST Mailbox Converter's list, not SMTP Debug Tool's).
Is SMTP Debug Tool or Softaken PST Mailbox Converter free?+
SMTP Debug Tool is free. Softaken PST Mailbox Converter has a free plan (Free Demo) and paid plans.
Do SMTP Debug Tool and Softaken PST Mailbox Converter integrate with the same tools?+
Their integration lists don't overlap: SMTP Debug Tool lists Amazon SES, SendGrid, Mailgun, Sendinblue and 4 more; Softaken PST Mailbox Converter lists Office 365, Gmail, Zimbra TGZ and Lotus Notes NSF.
On DevHunt
Softaken PST Mailbox Converter
0 upvotes · Launched on DevHunt on Jan 6, 2026
Based on each tool's website and DevHunt data. Details may change; check the official sites.