The Post SMTP Insider’s Guide
Everything we know about Post SMTP 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.
Post SMTP
The Insider’s Guide
WordPress SMTP plugin with email logs, alerts and backup mailers
Every plan, grade, refund rule and rival among email sending services, read from Post SMTP’s own pages.
Made by Saad Iqbal · checked Nov 13, 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 Post SMTP’s own pages, its app-store listings and our grades. Every fact in it is on Post SMTP’s page too, where it is kept up to date. Checked Nov 13, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.6
GPA, above 34 of the 50 other email sending services we grade
Post SMTP is a WordPress plugin that replaces the default PHP mail function with a connection to an SMTP or API mailer such as Gmail, Microsoft 365, Amazon SES, Brevo, Mailgun or SendGrid. It adds email logs, failure alerts, a fallback connection and a mobile app, with extra features in a paid Pro edition.
To get you started, here are 8 things to know about Post SMTP, taken from its own pages and our grades.
You install it in WordPress and connect a mail provider.
- 1
Best for a WordPress mail plugin with logs and a phone app
Post SMTP is a WordPress plugin that connects your site to a mail provider, and the free version includes email logs, failure alerts and a fallback connection.
- 2
There is a free plan
Free plugin on WordPress.org with a setup wizard, email logs, failure alerts, fallback mailer and mailers such as SMTP.com, Brevo and Mailgun.
- 3
It runs on 3 platforms
Web, iOS and Android.
- 4
Setup wizard
A three-step wizard configures a mailer using API keys, with a one-click setup for Gmail and Microsoft 365 listed as Pro features.
- 5
Email logs
Lists sent and failed emails with their status and error messages, and can be filtered.
- 6
Failure alerts
Alerts by email, Slack, SMS through Twilio or push notification when an email fails to deliver.
- 7
A 2.6 GPA, above 34 of 50
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 Post SMTP 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.
Post SMTP at a glance
- Pricing
- Free plan
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web, iOS, Android
- Made by
- Saad Iqbal
- Category
- Email Sending Services
- Our grade
- 2.6 GPA, good
The report card
Best for a WordPress mail plugin with logs and a phone app
Post SMTP is a WordPress plugin that connects your site to a mail provider, and the free version includes email logs, failure alerts and a fallback connection. Gmail and Microsoft 365 one-click setup, SES and auto-resend are Pro, and Pro's price couldn't be read.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | The free plugin covers logs, alerts and a backup connection. Pro pricing couldn't be read, because the vendor's own site showed a maintenance page on 13 November 2026. |
| Free plan and trial | B | Free plugin on WordPress.org with a setup wizard, email logs, failure alerts, a fallback mailer and mailers such as SMTP.com, Brevo and Mailgun. |
| Features | C | Setup wizard, logs, alerts, fallback, DNS checks and a mobile app. One-click Gmail and Microsoft 365 setup, Amazon SES, Zoho, auto-resend and batching are Pro. |
| Ease of use | C | No store rating on record. You install it in WordPress and connect a mail provider. |
| Platforms and integrations | B | Runs inside WordPress, with an iOS and Android app, and connects to Gmail, Microsoft 365, SES, Brevo, Mailgun, SendGrid, Postmark and Slack. |
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 Post SMTP is for
- Fits if you run WordPress and want failed-email alerts on your phone
- Works for sites that need a backup SMTP connection without paying
Who it is not for
- Skip it if you don't run WordPress, as it only works inside it
- Tight if you stay on free: one-click Gmail and Microsoft 365, Amazon SES, Zoho and auto-resend are Pro
- Watch out: Pro pricing couldn't be read, as the vendor's site showed a maintenance page
- Watch out: it needs an account with a separate mailer
Good to know
Good for
- WordPress sites that need to see which emails failed and why
- Site owners who want alerts on a phone or in Slack
- Agencies that need to manage many sites through MainWP
Worth knowing
- Runs only inside WordPress and needs an account with a separate mailer.
- The plugin listing marks Microsoft 365 and Gmail one-click setup, Amazon SES, Zoho Mail, auto-resend of failed emails and email batching as Pro features.
- Pro pricing could not be read: the vendor's own site, postmansmtp.com, showed a maintenance page on 2026-11-13.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
1
plan
Post SMTP has a free plan.
The free plugin covers logs, alerts and a backup connection.
Free
$0
Free plugin from WordPress.org: setup wizard, email logs, reports, failure alerts and a backup SMTP connection.
The free plan
Free plugin on WordPress.org with a setup wizard, email logs, failure alerts, fallback mailer and mailers such as SMTP.com, Brevo and Mailgun.
Read from wordpress.org on Nov 13, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
3
Places it runs: Web, iOS and Android
WordPress SMTP plugin with email logs, alerts and backup mailers. Here is what it does, as its own site describes it, and what it covers: reports, transactional email.
Setup wizard, logs, alerts, fallback, DNS checks and a mobile app.
- Setup wizard
- A three-step wizard configures a mailer using API keys, with a one-click setup for Gmail and Microsoft 365 listed as Pro features.
- Email logs
- Lists sent and failed emails with their status and error messages, and can be filtered.
- Failure alerts
- Alerts by email, Slack, SMS through Twilio or push notification when an email fails to deliver.
- Fallback mailer
- A backup SMTP connection sends email when the main mailer is unavailable.
- Mobile app
- A companion app shows email status and failure alerts on a phone; resending and multi-site monitoring are Pro.
- DNS record checks
- A spam score checker looks at a domain's SPF, DKIM and DMARC records.
Where it runs
- Web
- iOS
- Android
What it works with
- Gmail
- Microsoft 365
- Amazon SES
- Brevo
- Mailgun
- SendGrid
- Postmark
- Slack
Post SMTP is made by Saad Iqbal.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
34/50
Other email sending services it is graded above
Post SMTP's GPA of 2.6 is higher than 34 of the 50 other email sending services we grade, and level with 11.
It stands best on free plan and trial (B, above 35 of 50) and worst on features (C, above 0).
Each grade against the category
Every bar is all 51 email sending services we grade, cut by the letter each got. Post SMTP’s own letter is outlined.
- BValue for moneyAbove 25 of 50
- BFree plan and trialAbove 35 of 50
- CFeaturesAbove 0 of 50
- CEase of useAbove 7 of 50
- BPlatforms and integrationsAbove 17 of 50
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 Post SMTP 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.
It is one of the better ones too: its GPA of 2.6 is higher than 34 of the 50 other email sending services we grade.
What you could make
- Reports: an app builder makes this well.
What you could not
- Mail servers with a good name among inbox providers.
- A real app for iOS and Android. Something home-made would be a web page.
- It plugs into other products, Gmail, Microsoft 365 and Amazon SES among them.
What this rests on. Post SMTP’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
WP Mail SMTP, FluentSMTP, SendLayer and SMTP.com
The 4 tools Post SMTP is most often weighed against, with where each one differs from it.
- 2.6GPA
WP Mail SMTP
Free plan · from $99/yr
WordPress plugin that routes site email through an SMTP provider.
- Only Post SMTP lists iOS and Android apps.
- 3.2GPA
FluentSMTP
Free
Free WordPress plugin for sending site email through your provider.
- Only Post SMTP lists iOS and Android apps.
- FluentSMTP is open source, according to its own site.
- 2.4GPA
SendLayer
Free trial · from $5/mo
Transactional email over SMTP or API, aimed at WordPress sites.
- Post SMTP has a free plan. SendLayer does not, though it has a free trial.
- Only Post SMTP lists iOS and Android apps.
- Post SMTP also covers reports.
- 1.8GPA
SMTP.com
From $25/mo
SMTP relay and email API sold in monthly volume plans from 50,000.
- Post SMTP has a free plan. SMTP.com does not.
- Only Post SMTP lists iOS and Android apps.
- Post SMTP also covers reports.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
11
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 Post SMTP free?
Post SMTP has a free plan. Free plugin on WordPress.org with a setup wizard, email logs, failure alerts, fallback mailer and mailers such as SMTP.com, Brevo and Mailgun.
How much does Post SMTP cost?
Post SMTP lists one plan. Free: $0.
What platforms does Post SMTP work on?
Post SMTP is available on Web, iOS and Android.
Does Post SMTP have a Windows app?
No Windows app was listed when its pages were read on Nov 13, 2026. Post SMTP is listed for Web, iOS and Android.
Does Post SMTP have a macOS app?
No macOS app was listed when its pages were read on Nov 13, 2026. Post SMTP is listed for Web, iOS and Android.
Is Post SMTP open source?
Post SMTP is not described as open source on its own site, as read on Nov 13, 2026.
What does Post SMTP integrate with?
Post SMTP's listing names Gmail, Microsoft 365, Amazon SES, Brevo, Mailgun, SendGrid, Postmark and Slack.
Who makes Post SMTP?
Post SMTP is made by Saad Iqbal.
What are the alternatives to Post SMTP?
The closest alternatives to Post SMTP in our directory are WP Mail SMTP, FluentSMTP, SendLayer and SMTP.com.
How does Post SMTP compare with other email sending services?
Post SMTP's GPA of 2.6 is higher than 34 of the 50 other email sending services we grade, and level with 11.
Could I make my own version of Post SMTP?
To replace Post SMTP 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 Post SMTP’s own pages on Nov 13, 2026, and the grades were given on Nov 13, 2026. Graded from this listing, whose facts were read from Post SMTP's own pages on 13 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 Saad Iqbal. Prices change, so check postmansmtp.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
7,721
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.
7,721
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Post SMTP, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/post-smtp
- 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, "Post SMTP: The Insider's Guide", checked Nov 13, 2026. https://toolgpa.com/tools/post-smtp
Know someone choosing between email sending services?
Send them this guide: toolgpa.com/tools/post-smtp/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded email sending services after Post SMTP, each with an Insider's Guide of its own.
- Email Sending Services Insider's GuideEvery one of the 51 email sending services we grade, compared
- FluentSMTP Insider's GuideFree WordPress plugin for sending site email through your provider3.2 GPA
- Amazon SES Insider's GuideAWS email sending and receiving, paid per 1,000 emails2.8 GPA
- Forward Email Insider's GuideOpen-source email forwarding and hosting for custom domains2.8 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 Post SMTP’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. Post SMTP is a trademark of its owner, and this guide is not made, paid for or approved by Saad Iqbal. Prices and plans change: check postmansmtp.com before you buy.