Question 1

How do I test my SMTP server connection?

Accepted Answer

Enter your SMTP server hostname, port (usually 587 or 465), security mode, and credentials on HubTools SMTP Test Tool. Click Test it to see the live SMTP conversation and whether authentication succeeds.

Question 2

Can I send a test email with this tool?

Accepted Answer

Yes. Fill in From and To email addresses along with your SMTP settings. HubTools will attempt to deliver a short test message and show the server responses.

Question 3

Which SMTP ports should I use?

Accepted Answer

Port 587 with STARTTLS is most common. Port 465 uses implicit SSL/TLS. Port 25 is often blocked by hosting providers. Try Auto security mode first — HubTools picks the right option based on your port.

Question 4

Are my SMTP credentials stored?

Accepted Answer

No. Credentials are used only for the active test request and are not saved or logged. Passwords never appear in the conversation log.

Question 5

Why does SMTP authentication fail?

Accepted Answer

Common causes include wrong username/password, incorrect port or security setting, IP blocking by your provider, or needing an app-specific password. The SMTP log shows the exact server error code to help you fix the issue.

Question 6

Is this HubTools tool free worldwide?

Accepted Answer

Yes. HubTools is free in every country — United States, United Kingdom, India, Canada, Australia, Germany, France, Spain, Brazil, Mexico, Indonesia, Philippines, UAE, and 180+ more. No signup and no watermark on downloads.

Question 7

Can I use this tool if I search in Spanish, French, or German?

Accepted Answer

Yes. HubTools works for users who search in English or other languages — for example unir pdf, comprimir pdf, fusionner pdf, convertir pdf a word, pdf zusammenfügen, or jpg a pdf. The interface is in English; all tools are the same free HubTools experience worldwide.

Question 8

Is this HubTools tool completely free?

Accepted Answer

Yes. HubTools tools are free to use with no signup required for basic operations. There is no watermark on output files.

Question 9

Can I use HubTools on iPhone, Android, or tablet?

Accepted Answer

Yes. HubTools works in Chrome, Safari, Firefox, and Edge on phones, tablets, and desktops. Many tools support mobile phone upload via QR code.

Question 10

Are my files private on HubTools?

Accepted Answer

Most tools process files locally in your browser. We do not permanently store uploaded documents on our servers. See our Privacy Policy for details.

Question 11

Is HubTools a free ilovepdf or Smallpdf alternative?

Accepted Answer

Yes. HubTools offers merge PDF, compress PDF, PDF to Word, JPG to PDF, split PDF, edit PDF, and 60+ tools free — with no watermark and browser-based processing.