The AuthSMTP Insider’s Guide
Everything we know about AuthSMTP in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
AuthSMTP
The Insider’s Guide
Authenticated outgoing SMTP relay, billed by the year
Every plan, grade, refund rule and rival among email sending services, read from AuthSMTP’s own pages.
Made by GetOnline Ltd · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from AuthSMTP’s own pages, its app-store listings and our grades. Every fact in it is on AuthSMTP’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
1.8
GPA, above 0 of the 26 other email sending services we grade
AuthSMTP is an outgoing SMTP relay for websites, mailing lists and email applications. Accounts are named by their monthly message allowance and billed annually, from 2,000 messages a month up to millions, with shared IPs on the smaller accounts. A 14-day money-back guarantee covers new accounts paid by card or PayPal.
To get you started, here are 8 things to know about AuthSMTP, taken from its own pages and our grades.
It has no campaign builder or marketing tools, and there is no free plan or trial.
- 1
Best for sending from an app or device through SMTP
AuthSMTP is an authenticated SMTP relay: you point your mail program or app at it and send.
- 2
Paid plans start at $6 a month when paid by the year
As its pricing page puts it: $72 per year for 2,000 emails a month.
- 3
It runs on Web
Web.
- 4
Authenticated SMTP
Sends from any application through an authenticated SMTP server, with SSL or TLS, alternative ports and multiple concurrent connections.
- 5
Multiple from addresses and domains
Each account allows a set number of from addresses or domains, from 20 on the smallest to 600 on the larger accounts.
- 6
Flexible quota upgrades
The site says an account can be boosted in a month as usage grows, with no automatic payments.
- 7
A 1.8 GPA, above 0 of 26
That is against the other email sending services we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
To replace AuthSMTP you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one.
AuthSMTP at a glance
- Pricing
- Paid, from $72 per year for 2,000 emails a month
- Free plan
- No
- Free trial
- None stated
- Runs on
- Web
- Made by
- GetOnline Ltd
- Category
- Email Sending Services
- Our grade
- 1.8 GPA, weak
The report card
Best for sending from an app or device through SMTP
AuthSMTP is an authenticated SMTP relay: you point your mail program or app at it and send. It starts at $72 a year for 2,000 emails a month, with plans billed by the year only. It has no campaign builder or marketing tools, and there is no free plan or trial.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | $72 a year for 2,000 emails a month works out to $6 a month, inside the cheapest quarter of email sending tools. It is billed yearly, and 10,000 emails a month is $216 a year. |
| Free plan and trial | F | No free plan and no trial. A 14-day money-back guarantee is not a trial, and it ends after 100 messages sent or an upgrade. |
| Features | C | It does one job: authenticated SMTP sending, with several from addresses, a control panel, logs and scanning. It is a smaller job, and it does that job fully. |
| Ease of use | C | A web control panel with no rating on record. You enter SMTP credentials into whatever sends your mail. |
| Platforms and integrations | C | Web control panel only, with no integrations listed on the pages read. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who AuthSMTP is for
- Fits if you want to send from your own domain through SMTP and need nothing else
- Works for older apps and devices that can only send through SMTP
Who it is not for
- Not for you if you want to try it free, because there is no free plan or trial
- Skip it if you want a campaign builder or marketing tools, as it is an SMTP relay only
- Watch out: pricing is by the year only, charged up front
- Watch out: the 14-day money-back guarantee covers only new card or PayPal accounts and ends after 100 messages
- Tight if you send big files: data allowances assume an average message of 300 KB
Good to know
Good for
- Small senders who want a low yearly price for an SMTP relay
- People who prefer paying once a year over a metered bill
- Sites that need a dependable relay without campaign tools
Worth knowing
- Pricing is by the year only, and no free plan or trial is offered.
- The 14-day money-back guarantee ends after 14 days, after 100 messages sent or after an upgrade, and covers new card or PayPal accounts only.
- It is an SMTP relay without a campaign builder or marketing tools.
- Data allowances are calculated on an average message size of 300 KB, which the pricing page lets you change.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$6
A month to start, paid by the year
AuthSMTP is a paid product, starting at $72 per year for 2,000 emails a month.
AuthSMTP 2
$72
per year for 2,000 emails a month
20 from addresses or domains, 600 MB of data a month, shared IP address.
AuthSMTP 4
$108
per year for 4,000 emails a month
40 from addresses or domains, 1.2 GB of data a month, shared IP address.
AuthSMTP 10
$216
per year for 10,000 emails a month
100 from addresses or domains and 3 GB of data a month. Steps of 6, 8 and 15 sit between the larger ones.
AuthSMTP 20
$336
per year for 20,000 emails a month
200 from addresses or domains and 6 GB of data a month.
AuthSMTP 50
$450
per year for 50,000 emails a month
500 from addresses or domains and 15 GB of data a month; the table marks a dedicated IP as available from this size.
AuthSMTP 100
$870
per year for 100,000 emails a month
600 from addresses or domains and 30 GB of data a month. Larger accounts continue past 1 million a month.
Read from authsmtp.com on Nov 12, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Authenticated outgoing SMTP relay, billed by the year. Here is what it does, as its own site describes it, and what it covers: public API, transactional email.
It does one job: authenticated SMTP sending, with several from addresses, a control panel, logs and scanning.
- Authenticated SMTP
- Sends from any application through an authenticated SMTP server, with SSL or TLS, alternative ports and multiple concurrent connections.
- Multiple from addresses and domains
- Each account allows a set number of from addresses or domains, from 20 on the smallest to 600 on the larger accounts.
- Flexible quota upgrades
- The site says an account can be boosted in a month as usage grows, with no automatic payments.
- Control panel and logs
- An online control panel shows account status and logged errors. A separate REST API is described, with message submission in beta.
- Security and scanning
- Messages are virus-scanned, with sender-domain validation and SPF and DKIM support. The site says it maintains PCI DSS compliance.
Where it runs
- Web
What it works with
Its own pages name no integrations.
AuthSMTP is made by GetOnline Ltd.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
0/26
Other email sending services it is graded above
AuthSMTP's GPA of 1.8 is higher than 0 of the 26 other email sending services we grade, and level with 1.
It stands best on value for money (B, above 11 of 26) and worst on free plan and trial (F, above 0).
Its paid plans start at $6 a month when paid by the year, against a middle price of $13.73 for the category: 2 of the 25 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 2 tools score higher and cost less.
Each grade against the category
Every bar is all 27 email sending services we grade, cut by the letter each got. AuthSMTP’s own letter is outlined.
- BValue for moneyAbove 11 of 26
- FFree plan and trialAbove 0 of 26
- CFeaturesAbove 0 of 26
- CEase of useAbove 1 of 26
- CPlatforms and integrationsAbove 0 of 26
Price against what you get
Each dot is one of 26 email sending services. Further left costs less; higher up scores better on features, ease of use and platforms. AuthSMTP is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace AuthSMTP you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 25 of the 26 other email sending services grade higher. It costs $72 a year.
What you could not
- Mail servers with a good name among inbox providers.
- An API that other software can build on.
What this rests on. AuthSMTP’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
SMTP2GO, turboSMTP, SMTP.com, Elastic Email and Mailjet
The 5 tools AuthSMTP is most often weighed against, with where each one differs from it.
- 2.2GPA
SMTP2GO
Free plan · from $15/mo
SMTP relay and email API priced by emails a month, with a free plan.
- SMTP2GO has a free plan. AuthSMTP does not.
- 2.2GPA
turboSMTP
Free plan · from $12.46/mo
SMTP relay and email API on European infrastructure, with a free plan.
- turboSMTP has a free plan. AuthSMTP does not.
- turboSMTP also covers email verification.
- 1.8GPA
SMTP.com
From $25/mo
SMTP relay and email API sold in monthly volume plans from 50,000.
- 2.6GPA
Elastic Email
Free plan · from $19/mo
Low-cost email API and SMTP relay priced by monthly email volume.
- Elastic Email has a free plan. AuthSMTP does not.
- Elastic Email also covers email campaigns and email verification.
- 2.4GPA
Mailjet
Free plan · from $8.10/mo
Email API, SMTP relay and campaign editor on one plan priced by volume.
- Mailjet has a free plan. AuthSMTP does not.
- Mailjet also covers marketing automation, email campaigns and email verification.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
12
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is AuthSMTP free?
No. AuthSMTP is a paid product, starting at $72 per year for 2,000 emails a month.
How much does AuthSMTP cost?
AuthSMTP lists 6 plans. AuthSMTP 2: $72 per year for 2,000 emails a month.
What platforms does AuthSMTP work on?
AuthSMTP is available on Web.
Does AuthSMTP have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. AuthSMTP is listed for Web.
Does AuthSMTP have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. AuthSMTP is listed for Web.
Is AuthSMTP open source?
AuthSMTP is not described as open source on its own site, as read on Nov 12, 2026.
Does AuthSMTP have an API?
Yes. AuthSMTP offers a public API, according to its own site.
Who makes AuthSMTP?
AuthSMTP is made by GetOnline Ltd.
What are the alternatives to AuthSMTP?
The closest alternatives to AuthSMTP in our directory are SMTP2GO, turboSMTP, SMTP.com, Elastic Email and Mailjet.
How does AuthSMTP compare with other email sending services?
AuthSMTP's GPA of 1.8 is higher than 0 of the 26 other email sending services we grade, and level with 1.
Is AuthSMTP good value for money?
ToolGPA grades AuthSMTP B for value for money. Its paid plans start at $6 a month when paid by the year, against a middle price of $13.73 for the category: 2 of the 25 others that charge start lower.
Could I make my own version of AuthSMTP?
To replace AuthSMTP you would be making mail servers with a good name among inbox providers.
Where this guide comes from
The prices, plans, platforms and features were read from AuthSMTP’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from AuthSMTP's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by GetOnline Ltd. Prices change, so check authsmtp.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- AuthSMTP, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/authsmtp
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "AuthSMTP: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/authsmtp
Know someone choosing between email sending services?
Send them this guide: toolgpa.com/tools/authsmtp/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
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- Forward Email Insider's GuideOpen-source email forwarding and hosting for custom domains2.8 GPA
- MailChannels Insider's GuideEmail API and SMTP relay for platforms with many downstream senders2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what AuthSMTP’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. AuthSMTP is a trademark of its owner, and this guide is not made, paid for or approved by GetOnline Ltd. Prices and plans change: check authsmtp.com before you buy.