Knowledgebase

The knowledgebase is organized into different categories. Either choose a category from below or search the knowledgebase for the answer to your question.

Articles

1. What is turboSMTP?

TurboSMTP is a professional and secure SMTP service designed to deliver any type of email with high deliverability. It offers reliable servers and...
Views: 677178

2. Which email clients are compatible with turboSMTP?

All major email clients are compatible with turboSMTP, including all versions of Microsoft Outlook, Microsoft Vista Mail, Microsoft Outlook...
Views: 618454

3. Can I use turboSMTP when I'm travelling abroad/overseas?

Of course, you can keep sending emails with turboSMTP just as you do at home.Set it up once, and it will work perfectly with any broadband, mobile...
Views: 631048

4. Do you offer a Free Trial?

Yes, all new registered users will be able to send 6.000 emails per month for free (with a maximum rate of 200 emails per day), with no purchase...
Views: 399448

5. Do I need a Credit Card to activate a Free Trial?

No, our Free Service (6.000 emails/month for a year) can be quickly activated without any credit card details or payment info. We are happy to...
Views: 348250

6. Is the Free Trial automatically activated to all new accounts?

All new accounts eligible for the Free Service are reviewed by our staff. You will receive an email notification once your activation is...
Views: 342111

7. Why my free account has been closed?

TurboSMTP cares about the quality of service for all its customers, even those who enjoy a free account. We reserve the right to terminate any free...
Views: 287421

8. Can I manage my account online?

Yes - in your account management area you will be able to control everything related to your turboSMTP account: Manage your details (personal...
Views: 627769

9. How can I change my password?

Changing your password is a quick and easy way to keep your account secure. Here's how to do it: Log in to your dashboard. Click on your...
Views: 294197

10. Is the email address with which I signed up the only one that I can use as a sender?

No, not at all. You are free to use any other email address as a sender for your mailings, besides of course the one used to subscribe to...
Views: 327548

11. Can I use as a sender a different email address from the one I subscribed with?

Yes, you can: you can put as a sender address whichever email address you want and keep using turboSMTP. Remember anyhow that you must sign up...
Views: 287518

12. I have more than one email address. Should I open multiple accounts?

No, you just need to create one single account. With turboSMTP you will be able to send emails from any of your email addresses, using the same...
Views: 649953

13. I want to change my plan. Can I do it?

You can order a new plan by following the steps below:1. Log in to your dashboard. 2. Click on your name in the top right corner of the...
Views: 22881258

14. How can I cancel the auto-renewal of my plan?

If you have paid via 2Checkout, go to your account page and login with your order number and email, then go to the "My Services" area....
Views: 333273

15. What if I want to cancel my monthly plan?

In order to ensure an uninterrupted service, all monthly plans will be automatically renewed at the end of the plan's Billing Cycle (monthly...
Views: 654811

16. How many emails can I send in a day? What is the maximum attachment size?

Our server process millions of emails a day, so the number of emails that can be sent within 24 hours is very high. But there are however...
Views: 681734

17. How do I keep track of sent emails?

With turboSMTP you can keep track of everything happens to your sent messages (delivery, bounce, opening, spam complaint etc.).After logging in to...
Views: 722132

18. What types of payment do you accept?

We accept payments from all major credit, debit cards and other circuits; for instance: Visa Mastercard American Express Maestro PayPal...
Views: 23236956

19. Can I pay via wire transfer?

Sure you can. And it's extremely easy: 1. Start the normal purchase procedure, specifying that you're going to pay with a credit...
Views: 351381

20. My VAT number is not recognized when I pay using 2Checkout. Why?

If you are in a European country and you purchase any service at turboSMTP via 2Checkout (formerly Avangate), it is necessary that your VAT is...
Views: 380262

21. I have made a payment, but the invoice seems still unpaid. What should I do?

The system takes a few minutes to process the payment: simply wait a bit until a confirmation email comes from the gateway that you have...
Views: 357954

22. Why my emails are going to the spam folder?

It can unfortunately happen that your mass mailings end up as spam or are rejected by the recipients' server. This often isn't due to a...
Views: 583567

23. What is a "dropped" email?

When an email account to which you're sending produces a bounce (most of the times, because it's non-existent), our system puts it...
Views: 375801

24. How can I ask the permission to send a newsletter?

A mass emailing is valid and useful only if it's permission-based. However, you can send a first welcome email also to people who...
Views: 383241

25. Can I send a PDF attached to my newsletter with turboSMTP?

Yes, of course.But pay attention: we have observed that if you send your email with Outlook or other email clients by Microsoft, some PDF encoding...
Views: 362871

26. Can I configure my DKIM, DMARC and SPF to get the highest delivery rates?

Sure you can! In fact, we highly recommend it. It's extremely important to make the most of turboSMTP's services and...
Views: 20609156

27. I cannot configure the DNS of my domain. How can I do?

Configuring the DNS domain of the website from which you send your emails, inserting the SPF and DKIM authentication strings, is a critical step to...
Views: 402013

28. The string ”user = @ user.com turbo-smtp.com; On behalf of; <user@userdomain.com>”, appears in recipient's sender field . What does it mean?

This string is not the result of an error. It contains information on the service used to send a particular email.When you use an SMTP service, the...
Views: 611806

29. What if the sender domain is not verified? (Re-enveloped Sender)

After your turboSMTP account is activated, you can start sending emails even if your sender domain is not yet verified. In this case, our system...
Views: 629066

30. Can I use turboSMTP with Outlook or Thunderbird and send a mass email via CC/BCC?

From a technical point of view, you can. But we strongly suggest not to use normal email clients (such as Mozilla Thunderbird, Microsoft Outlook or...
Views: 286605

31. How can I get notified of my bounce?

Want to keep a close eye on your bounce notifications? You can easily choose how to receive them directly in your inbox or let turboSMTP manage...
Views: 301064

32. Yahoo emails in queue with high complain rate error

Having a problem with recipients @Yahoo, Aol.com or Verizon.  Make sure you register your sender domain at Yahoo complaint feedback...
Views: 177559

33. What is Smart Routing?

Smart Routing is a feature that automatically rotates between multiple shared IPs when sending emails. If one IP encounters a delay, deferral, or...
Views: 667

34. What is the difference between Smart Routing and Dedicated IP Pools?

Smart Routing uses a pool of shared IPs. If an email delivery fails or is deferred, the system automatically retries using another IP from the...
Views: 730

35. My ISP blocks outgoing mail on port 25. What can I do?

In case port 25 (the default port for SMTP) is blocked you can choose an alternate port. We suggest to use port 587 or 2525 for plain SMTP, and...
Views: 23635170

36. Why is turboSMTP still using the free emails even if I bought a paid plan?

turboSMTP first uses all the email relays provided by the free plan (200/day), which are granted to all users.Then, once these emails are finished,...
Views: 295287

37. I just purchased a monthly plan/prepaid but I can't send emails. Why?

The activation process is not immediate. Your account will be reviewed and activated as soon as we receive payment approval from our payment gateway.
Views: 647710

38. I have renewed my plan, but the email counter hasn't updated yet. Why?

Your turboSMTP dashboard features a counter to help you easily track emails sent and emails remaining within your plan. This counter updates after...
Views: 343545

39. How can I submit a support ticket?

To get assistance, here's how you can quickly open a support ticket from your dashboard. Log in to your dashboard. Click the question mark...
Views: 308977

40. Anti-Spam Policy

Please review our comprehensive Anti-Spam Policy for detailed information on our guidelines and commitment to preventing unsolicited email.
Views: 634543

41. Privacy Policy

For information on how we collect, use, and protect your data, please refer to our Privacy Policy.
Views: 608703

42. Terms and Conditions

Our Terms and Conditions outline the rules and regulations for the use of our turboSMTP product.
Views: 552584

1. What is turboSMTP?
TurboSMTP is a professional and secure SMTP service designed to deliver any type of email with...
Views: 677178
2. Which email clients are compatible with turboSMTP?
All major email clients are compatible with turboSMTP, including all versions of Microsoft...
Views: 618454
3. Can I use turboSMTP when I'm travelling abroad/overseas?
Of course, you can keep sending emails with turboSMTP just as you do at home.Set it up once, and...
Views: 631048
4. Do you offer a Free Trial?
Yes, all new registered users will be able to send 6.000 emails per month for free (with a...
Views: 399448
5. Do I need a Credit Card to activate a Free Trial?
No, our Free Service (6.000 emails/month for a year) can be quickly activated without any credit...
Views: 348250
6. Is the Free Trial automatically activated to all new accounts?
All new accounts eligible for the Free Service are reviewed by our staff. You will receive an...
Views: 342111
7. Why my free account has been closed?
TurboSMTP cares about the quality of service for all its customers, even those who enjoy a free...
Views: 287421
8. Can I manage my account online?
Yes - in your account management area you will be able to control everything related to your...
Views: 627769
9. How can I change my password?
Changing your password is a quick and easy way to keep your account secure. Here's how to do...
Views: 294197
10. Is the email address with which I signed up the only one that I can use as a sender?
No, not at all. You are free to use any other email address as a sender for your mailings,...
Views: 327548
11. Can I use as a sender a different email address from the one I subscribed with?
Yes, you can: you can put as a sender address whichever email address you want and keep using...
Views: 287518
12. I have more than one email address. Should I open multiple accounts?
No, you just need to create one single account. With turboSMTP you will be able to send emails...
Views: 649953
13. I want to change my plan. Can I do it?
You can order a new plan by following the steps below:1. Log in to your dashboard....
Views: 22881258
14. How can I cancel the auto-renewal of my plan?
If you have paid via 2Checkout, go to your account page and login with your order...
Views: 333273
15. What if I want to cancel my monthly plan?
In order to ensure an uninterrupted service, all monthly plans will be automatically renewed at...
Views: 654811
16. How many emails can I send in a day? What is the maximum attachment size?
Our server process millions of emails a day, so the number of emails that can be sent within 24...
Views: 681734
17. How do I keep track of sent emails?
With turboSMTP you can keep track of everything happens to your sent messages (delivery, bounce,...
Views: 722132
18. What types of payment do you accept?
We accept payments from all major credit, debit cards and other circuits; for instance: Visa...
Views: 23236956
19. Can I pay via wire transfer?
Sure you can. And it's extremely easy: 1. Start the normal purchase procedure, specifying...
Views: 351381
20. My VAT number is not recognized when I pay using 2Checkout. Why?
If you are in a European country and you purchase any service at turboSMTP via 2Checkout...
Views: 380262
21. I have made a payment, but the invoice seems still unpaid. What should I do?
The system takes a few minutes to process the payment: simply wait a bit until...
Views: 357954
22. Why my emails are going to the spam folder?
It can unfortunately happen that your mass mailings end up as spam or are rejected by the...
Views: 583567
23. What is a "dropped" email?
When an email account to which you're sending produces a bounce (most of the times, because...
Views: 375801
24. How can I ask the permission to send a newsletter?
A mass emailing is valid and useful only if it's permission-based. However, you can...
Views: 383241
25. Can I send a PDF attached to my newsletter with turboSMTP?
Yes, of course.But pay attention: we have observed that if you send your email with Outlook or...
Views: 362871
26. Can I configure my DKIM, DMARC and SPF to get the highest delivery rates?
Sure you can! In fact, we highly recommend it. It's extremely important to...
Views: 20609156
27. I cannot configure the DNS of my domain. How can I do?
Configuring the DNS domain of the website from which you send your emails, inserting the SPF and...
Views: 402013
28. The string ”user = @ user.com turbo-smtp.com; On behalf of; <user@userdomain.com>”, appears in recipient's sender field . What does it mean?
This string is not the result of an error. It contains information on the service used to send a...
Views: 611806
29. What if the sender domain is not verified? (Re-enveloped Sender)
After your turboSMTP account is activated, you can start sending emails even if your sender...
Views: 629066
30. Can I use turboSMTP with Outlook or Thunderbird and send a mass email via CC/BCC?
From a technical point of view, you can. But we strongly suggest not to use normal email clients...
Views: 286605
31. How can I get notified of my bounce?
Want to keep a close eye on your bounce notifications? You can easily choose how to receive them...
Views: 301064
32. Yahoo emails in queue with high complain rate error
Having a problem with recipients @Yahoo, Aol.com or Verizon.  Make sure you register your...
Views: 177559
33. What is Smart Routing?
Smart Routing is a feature that automatically rotates between multiple shared IPs when sending...
Views: 667
34. What is the difference between Smart Routing and Dedicated IP Pools?
Smart Routing uses a pool of shared IPs. If an email delivery fails or is deferred, the system...
Views: 730
35. My ISP blocks outgoing mail on port 25. What can I do?
In case port 25 (the default port for SMTP) is blocked you can choose an alternate port. We...
Views: 23635170
36. Why is turboSMTP still using the free emails even if I bought a paid plan?
turboSMTP first uses all the email relays provided by the free plan (200/day), which are granted...
Views: 295287
37. I just purchased a monthly plan/prepaid but I can't send emails. Why?
The activation process is not immediate. Your account will be reviewed and activated as soon as...
Views: 647710
38. I have renewed my plan, but the email counter hasn't updated yet. Why?
Your turboSMTP dashboard features a counter to help you easily track emails sent and emails...
Views: 343545
39. How can I submit a support ticket?
To get assistance, here's how you can quickly open a support ticket from your dashboard....
Views: 308977
40. Anti-Spam Policy
Please review our comprehensive Anti-Spam Policy for detailed information on our guidelines and...
Views: 634543
41. Privacy Policy
For information on how we collect, use, and protect your data, please refer to our Privacy Policy.
Views: 608703
42. Terms and Conditions
Our Terms and Conditions outline the rules and regulations for the use of our turboSMTP product.
Views: 552584