AuthSMTP review (2026): is it worth $72 a year?
Authenticated outgoing SMTP relay, billed by the year
Black Friday: is there a AuthSMTP sale?
AuthSMTP report card
Weak · out of 4.0 · graded Nov 12, 2026
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.
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 AuthSMTP 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
Why AuthSMTP gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for money$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.
- FFree plan and trialNo 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.
- CFeaturesIt 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.
- CEase of useA web control panel with no rating on record. You enter SMTP credentials into whatever sends your mail.
- CPlatforms and integrationsWeb control panel only, with no integrations listed on the pages read.
What these grades rest on. 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. How we review and grade.
Make AuthSMTP? Put this grade on your site
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<a href="https://toolgpa.com/tools/authsmtp#review"><img src="https://toolgpa.com/badge/authsmtp.svg" alt="AuthSMTP: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where AuthSMTP stands among 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.
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, level with 12
- FFree plan and trialAbove 0 of 26, level with 1
- CFeaturesAbove 0 of 26, level with 9
- CEase of useAbove 1 of 26, level with 25
- CPlatforms and integrationsAbove 0 of 26, level with 5
Price against what you get
Each dot is one of 26 email sending services. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep AuthSMTP, or make your own?
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.
What is AuthSMTP?
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.
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.
Key features
- 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.
AuthSMTP pricing
As of Nov 12, 2026, AuthSMTP is a paid product, starting at $72 per year for 2,000 emails a month.
- Starts at
- $72 per year for 2,000 emails a month
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| AuthSMTP 2 | $72per year for 2,000 emails a month | 20 from addresses or domains, 600 MB of data a month, shared IP address. |
| AuthSMTP 4 | $108per year for 4,000 emails a month | 40 from addresses or domains, 1.2 GB of data a month, shared IP address. |
| AuthSMTP 10 | $216per 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 | $336per year for 20,000 emails a month | 200 from addresses or domains and 6 GB of data a month. |
| AuthSMTP 50 | $450per 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 | $870per 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. Prices change, so confirm with AuthSMTP before you buy.
AuthSMTP alternatives
- AuthSMTP vs SMTP2GO
Free plan · from $15/mo
- AuthSMTP vs turboSMTP
Free plan · from $12.46/mo
- AuthSMTP vs SMTP.com
From $25/mo
- AuthSMTP vs Elastic Email
Free plan · from $19/mo
- AuthSMTP vs Mailjet
Free plan · from $8.10/mo
Common questions
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.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.