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: 853758

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: 742717

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: 789005

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: 503371

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: 453233

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: 433733

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: 372513

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: 767942

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: 406523

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: 421579

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: 376028

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: 793877

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: 23121247

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: 426117

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: 801569

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: 845124

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: 885305

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: 23806587

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: 455730

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: 492278

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: 453892

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: 712663

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: 505568

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: 484772

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: 463042

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: 21387646

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: 510422

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: 769536

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: 788964

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: 398602

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: 412218

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: 277098

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: 69757

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: 65478

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: 24465618

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: 422538

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: 804969

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: 468244

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: 447427

40. Anti-Spam Policy

Please review our comprehensive Anti-Spam Policy for detailed information on our guidelines and commitment to preventing unsolicited email.
Views: 768955

41. Privacy Policy

For information on how we collect, use, and protect your data, please refer to our Privacy Policy.
Views: 866877

42. Terms and Conditions

Our Terms and Conditions outline the rules and regulations for the use of our turboSMTP product.
Views: 693068

1. What is turboSMTP?
TurboSMTP is a professional and secure SMTP service designed to deliver any type of email with...
Views: 853758
2. Which email clients are compatible with turboSMTP?
All major email clients are compatible with turboSMTP, including all versions of Microsoft...
Views: 742717
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: 789005
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: 503371
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: 453233
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: 433733
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: 372513
8. Can I manage my account online?
Yes - in your account management area you will be able to control everything related to your...
Views: 767942
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: 406523
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: 421579
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: 376028
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: 793877
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: 23121247
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: 426117
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: 801569
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: 845124
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: 885305
18. What types of payment do you accept?
We accept payments from all major credit, debit cards and other circuits; for instance: Visa...
Views: 23806587
19. Can I pay via wire transfer?
Sure you can. And it's extremely easy: 1. Start the normal purchase procedure, specifying...
Views: 455730
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: 492278
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: 453892
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: 712663
23. What is a "dropped" email?
When an email account to which you're sending produces a bounce (most of the times, because...
Views: 505568
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: 484772
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: 463042
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: 21387646
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: 510422
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: 769536
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: 788964
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: 398602
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: 412218
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: 277098
33. What is Smart Routing?
Smart Routing is a feature that automatically rotates between multiple shared IPs when sending...
Views: 69757
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: 65478
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: 24465618
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: 422538
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: 804969
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: 468244
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: 447427
40. Anti-Spam Policy
Please review our comprehensive Anti-Spam Policy for detailed information on our guidelines and...
Views: 768955
41. Privacy Policy
For information on how we collect, use, and protect your data, please refer to our Privacy Policy.
Views: 866877
42. Terms and Conditions
Our Terms and Conditions outline the rules and regulations for the use of our turboSMTP product.
Views: 693068