Virtual Faxing from anywhere, at any time & on any device

With even more great features!

Virtual faxing over IP Networks

Send as many attachments at one time with iFax.Pro

Unlimited Emails

Add an unlimited amount of authorized emails to send & receive faxes from

Unlimited Attachments

Send as many attachments at one time with iFax.Pro using the portal or your email platform

Download Past Faxes

Fax documents are kept on file for 60 days for you to access, download or review

Fax From Anywhere

Login to your account from any device and send faxes while you are on the go!


Email to Fax

Send and receive faxes by email when you use the email: number@ifax.pro


No Page Limits

Send as many pages as you need without any limit restrictions

Built to Give You Options & Control

QuestBlue is committed to delivering high-performing products and solutions through continuous innovated & operational excellence.

Text Options

Fax dense text or embedded images

File Formats

Send Word Docs, PDFs or JPGs


Our TDM-Based Network delivers high-speed Faxes


Fax from your own email, the API, or our standalone browser client

Enjoy an Instant Setup with No Hassle

Watch this video & see how easy it is to setup your account!


Frequently Asked iFax Questions

Can I use my Fax Machine on iFax.pro?

The short answer is no. The iFax.pro platform is part of our Pro line. A web-based fax solution that does not have QuestBlue branding or contact information.


Can I have multiple users in my fax program?

No, not with iFax.pro however we do have that available in Enterprise.iFax.Pro. Enterprise.iFax.Pro offers a manager login with the ability to manage other fax users and fax numbers.

Is there an HTTPS adapter that I can use with my fax machine?

QuestBlue has an arrangement in place for you to be able to use your Audiocodes HTTPS fax adapter with our platform. Contact us to learn more. An ATA is not supported by iFax.Pro as that is a voice adapter designed for voice. You can connect an ATA to your PBX or directly to our SIP Trunks and attempt T.38 however that is not the iFax.Pro platform and cannot be used in conjunction with iFax.Pro.

How do I send the fax from my email account?

To send a fax using our Email-to-Fax service simply send an email using the following parameters. Email-to-Fax supports up to 5 attachments. 

Attachments may be sent in JPG, PNG, BMP, PDF, MS Word, MS Excel & Plain Text formats.

To: 10_digits_fax_number@ifax.pro

 From: authorized@email_address.com

 Subject: your_10_digits_vfax_number

 {You may now add ‘cover page’ to the subject line to have our system utilize the email body as a cover page)


Upon submission, our system will reply with a confirmation or rejection notice.

with iFax.Pro.

Can I email to fax and fax to email with iFax.Pro?

Yes, we fully support fax to email and email to fax with this server. 

Do I need to purchase any special equipment to use iFax.Pro?

No, iFax.Pro can be used in the web interface or with email to fax and fax to email.


Can I Fax International with iFax.pro?

No, not at the moment. You can however receive a fax from anywhere in the world.

Can I get a fax number in other areas even if I don't live there?

Yes, you can order a fax number from just about any location in the North American Numbering Plan, NANP.

Real Customers. Real Results.


“The Longer I use QuestBlue, the more I like this company and how much they care about the customer and doing it right. I have had the opportunity to work with several of the staff & support members, and I will say they are extremely knowledgeable about what they do.”

Christopher Cutshaw

“QuestBlue is the gold standard of VoIP services. We have NEVER been down. We build command vehicles for Emergency Responders, Police, Fire, and Military Agencies. We use QuestBlue because our communication needs are an absolute priority during natural disasters & major events.”

Director of IT Services

“At QuestBlue, they actually answer the phone and I have not had one issue with the process and their portal is better. Since my move, I found the QuestBlue Portal to be easier, faster and all for a lower cost.” 

Darlene C.

Why QuestBlue?

Toll free and local number porting with QuestBlue allows you to transfer telephone numbers between carriers. With QuestBlue, porting your number is incredibly fast, easy, and you maintain ownership of your telephone numbers. There are no minimum contractual agreements required, AND NO SETUP FEES! QuestBlue never charges setup fees on DID, 911, servers, or anything in our portal, ever! Port your numbers for FREE.

You can register for your account and begin the journey today! You can even be assigned a dedicated portability specialist that will be with you every step of the way. Do you have project ports? Different mix of carriers over the years? The need to pull a CSR without it feeling like an act of congress? If you answered YES to any of these questions, you have come to the right place!

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