Sergey Kargopolov
Founder · 2 products on SaaS Hive
Founder @ SimploMail.com · Co-founder @ SaasHive.com · Instructor Partner @ Udemy.com
Products
Tools I Use & Recommend
Community Posts
You can now use SimploMail to send transactional emails. 5000 emails free.
I built SimploMail as an email newsletter delivery service, but it also exposes a REST API that you can use to send transactional emails from your SaaS or startup.If you need to send sign‑up confirmations, password reset links, or payment receipts, you can do it with a simple HTTP POST request. SimploMail gives you 5,000 email sends free, which is enough to start sending emails to your subscribers.SimploMail REST API endpointOnce you have:an accounta verified domainat least one verified sender email addressand an active API keyyou can send an email with a single request to this endpoint:POST https://api.simplomail.com/v1/email/sendThe sender email address is automatically set to your default verified sender. You do not need to include the from email in the payload.Request headersYou must include two headers:x-api-key: your SimploMail API keyContent-Type: application/jsonRequest bodyThe request body is a JSON object with the following fields:to – recipient email address (one recipient per request)subject – email subject; cannot be emptybody – email body content (plain text or HTML)isHtml – optional boolean; set to true if body contains HTML, otherwise it defaults to falseExample request to send a plain text email:curl -X POST https://api.simplomail.com/v1/email/send \ -H "x-api-key: YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "to": "[email protected]", "subject": "Welcome to SimploMail", "body": "This is a transactional email sent via the REST API." }'If you want to send an HTML email, set isHtml to true and use HTML in the body:curl -X POST https://api.simplomail.com/v1/email/send \ -H "x-api-key: YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "to": "[email protected]", "subject": "Welcome to SimploMail", "body": "<h1>Welcome</h1><p>This is a transactional HTML email.</p>", "isHtml": true }'On success, the API returns HTTP 200 with a JSON response:{ "message": "Email sent successfully", "messageId": "abc123-def456-ghi789"}The messageId value is useful for logging and troubleshooting.Safe testing with a dedicated email addressWhen you test your integration, you should not send to fake or random email addresses. Messages sent to non‑existent addresses will bounce, and repeated bounces can hurt your sender reputation and may cause your account to be locked or sending suspended.For development and testing, send to this dedicated address:[email protected] address simulates a real send. The API returns the same HTTP response you would receive for a real recipient, but no actual email is delivered. When you are ready to send real emails, replace the to field with a valid recipient address.I hope you will like it! I am always open to suggestions and feedback! Just let me know.
As a busy founder, what do you do to recharge?
As busy founders we work during the day, late evenings, and I am sure many of us work on weekends too. We are inspired. We have an idea and we want to turn it into something profitable. We want to succeed.But we can't sprint 24x7 forever. At some point it catches up with you. Rest is not optional - it is part of the job.So what do you do to reset?I go to the gym. And when I'm there, I try hard not to think about work at all. The funny thing is - the moment I stop thinking about work, a great idea pops up and I can't wait to get back to my computer 😅.
UI decisions get harder as your project grows
When your project starts growing, it gets harder to keep the UI simple. You want it to be easy to use, but you also want to put the right features in front of people.These days I am spending a lot of time thinking about the main landing page of SaasHive.com. I am trying to make it work well for two very different groups. Founders who want to launch their SaaS, and users who want to find a SaaS or AI tool they need.New features are coming in the next few days, and UI decisions are getting tougher.For example, starting today the landing page will show a list of trending posts from the Founder Community forums. This gives founders who are active in the community extra exposure.In the image below I highlighted the new section in green. Right now it shows 4 post cards, which fit into one row. I thought about showing 8 instead of 4, but time will tell if that was the right call. The landing page is getting bigger, and I did not want it to feel too crowded.I hope this gives you more motivation to share about your SaaS in the forum. More people can now see your post and learn about your product.
Does your website has an og:image? I added one for my SimploMail.com
My SimploMail.com now has a new hero section design and a new og:image.I think it is very important to have a proper og:image because most people will see your website for the first time not on your homepage, but inside a link preview on X, LinkedIn, Facebook, Slack, Discord, iMessage, or somewhere else.That preview becomes your first impression.If your site has no og:image, the shared link may look empty, broken, or generic. And if the preview looks low-effort, people are less likely to click. A good og:image makes your link look polished, trustworthy, and intentional.For anyone unfamiliar with it, og:image is part of the Open Graph meta tags you add to your page. These tags tell social platforms what title, description, URL, and image should appear when someone shares your link. The image is often the most noticeable part.I also added a Twitter Card. In practice, this gives platforms like X extra metadata so the link can render as a rich preview card, especially with a large image. In my case, I’m using:Open Graph tags like:<!-- Open Graph --> <meta property="og:site_name" content="SimploMail" /> <meta property="og:title" content="SimploMail — Email Newsletter Platform Without a Subscription" /> <meta property="og:description" content="Send email newsletters, sequences, and lead magnets without a monthly subscription. Pay only for emails actually sent. Credits never expire." /> <meta property="og:type" content="website" /> <meta property="og:url" content="https://simplomail.com/" /> <meta property="og:image" content="https://simplomail.com/og-image.png" /> <meta property="og:image:width" content="1200" /> <meta property="og:image:height" content="630" /> <meta property="og:image:alt" content="SimploMail — Simple. Powerful. Email Newsletter Delivery Service." />Twitter tags like:<!-- Twitter --> <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:site" content="@SimploMail" /> <meta name="twitter:title" content="SimploMail — Email Newsletter Platform Without a Subscription" /> <meta name="twitter:description" content="Send email newsletters, sequences, and lead magnets without a monthly subscription. Pay only for emails actually sent." /> <meta name="twitter:image" content="https://simplomail.com/og-image.png" /> <meta name="twitter:image:alt" content="SimploMail — Simple. Powerful. Email Newsletter Delivery Service." />I set the image to 1200×630, which is a very common and safe size for social sharing previews. I also added alt text, which is a small detail but still worth doing for accessibility and clarity.This is one of those small website improvements that does not take long to implement, but it improves how your product looks everywhere outside your website too.If you are building a SaaS, landing page, blog, or any product in public, I think this is worth doing early. People judge links before they judge products.
Make your vibe-coded site visible to search engines and AI crawlers
A week of focused work and I have a new service for SaaS founders created.If you vibe-coded your site, then its pages are not visible to search engines and AI crawlers. My new service, Unhid, fixes that by making your pages visible in a crawler-friendly way, so your site can actually be discovered, indexed, and shown in AI-driven results.What I like about Unhid is that it solves a problem a lot of founders do not even realize they have. Their site looks done, it works fine for visitors, but behind the scenes search engines and AI crawlers are not properly seeing the content, which means lost visibility, lost traffic, and missed opportunities to show up where people are searching.Check if your site has AI and search engine visibility issues for free: unhid.ai/audit
Done! Subscriber Segments are now also supported 🎊
Done! 🎊 My SimploMail email marketing platform now supports sending emails to groups, or "Segments". 🎊 And it supports API to let developers send transactional emails 🥳.Do you send email newsletters? Do you need to make you application send transactional emails like Password reset or Purchase confirmation? Come! My SimploMail is the most affordable option to send emails out of all 😊.
Subscriber Segments for Your Email Campaigns
Started working on a new feature for my SimploMail Email Marketing platform, and this time it’s Subscriber Segments.It will allow you to create custom segments of subscribers based on specific criteria. For example, you can send an email campaign to all subscribers who joined your list during a specific period of time.If you send email campaigns or newsletters, please consider using SimploMail. It’s the most affordable newsletter delivery platform out there. And it has a REST API for developers in case you want to integrate it with your application and send transactional emails as well :)
Rewarding active community members with additional visibility
Created a new feature that will help to spotlights most active SaaS applications during the month, and give them additional visibility. The rating of SaaS products will be based not only on the number of upvotes but also on the number of posts in the community written and replies posted. I feel that active community members should be rewarded with additional visibility for their SaaS.
Email API for your App
It was a super busy week but I managed to get a few more hours to work on an Email API for SimploMail. If your application needs to send transactional emails like: Password Rest, or other Email Notifications, let me know. I can help you onboard your application to SimploMail and let you send email messages for the cheapest possible price out there :).
You no longer need to manually configure DNS to verify domain name for sending emails.
What a productive week this was! 🎊I was able to complete a HUGE milestone for SimploMail.com. Now you no longer need to manually configure DNS records with GoDaddy or Cloudflare when verifying your domain name for sending emails.I implemented a simple wizard where you can just click a button to automatically configure DNS records, log in to GoDaddy, confirm your intent to verify a domain name - and it’s done! 🎊 Your domain is verified and fully configured to send emails 🥳. A huge success for my SimploMail project. I’m very optimistic and excited about the future of SimploMail 🙂