FreeAvailable now
HK$0No charge
- @mailsi.dev address
- 1 (at least 5 characters)
- Custom domain
- 1
- Aliases per domain
- Up to 3
- Catch-all
- Included
- Forwards per domain a day
- 200
- Replies a day
- 10
- Attachments
- 10 MB
Mail for your domain,
delivered to Gmail.
Add one MX record. Mail forwards to your Gmail, and replies go out from your own domain.
Free · No card needed · 1 domain and 1 @mailsi.dev address
Sender writes to [email protected]
- Sender writes to [email protected]
- Forwarded to your Gmail
- Reply goes out from your domain
See what your domain needs
yourbrand.hk looks valid. Here is the record to add.
Valid format
Just one DNS recordExample
- Type
- MX
- Name
- @ yourbrand.hk
- Priority
- 10
- Value
- q7t6bztp44b7cz62yrst.mx.mailsi.dev
Or claim a free @mailsi.dev address
How it works
How one email travels
Gets through
Senders email your domain as usual. Nothing to install.
Arrives
Spam is refused during delivery; the rest forwards to your Gmail.
Replies out
Reply in Gmail and it goes out from your domain.
Host your own domain
One MX record for your domain’s mail
Add one MX record at your DNS provider. It takes minutes to hours.
Cloudflare: DNS → Add record → type MX, name @, priority 10, paste the value above.
GoDaddy: My Products → DNS → Add → type MX, host @, priority 10, paste the value above.
At your DNS provider, look for the MX record, add one, set priority 10, and paste the value above. Step-by-step guides are in the setup guides.
DNS check
- MX record (required)For receiving mail. One record is enough.Detected
- SPF (recommended)Helps replies reach the recipient’s inbox.Not added
- DKIM (recommended)A signature proving the mail came from your domain.Not added
Demo screen. It does not check your domain.
Note: receiving mail on Google Workspace? This MX replaces your current mail records, so check first.
Features
Two things you will use every day
Any address at @yourbrand.hk forwards to your Gmail. Free allows 200 forwards per domain a day.
Inbox · your Gmail@yourbrand.hk
1 suspected spam message refused today during SMTP delivery.
Reply in Gmail and it goes out from your domain. Free allows 10 replies a day.
ReplySent via mailsi
Fromhello@yourbrand.hk via mailsi
Got it, I will reply tonight.
The sender sees [email protected], marked via mailsi.
“via mailsi”
Forwarded mail shows “via mailsi”. We do not hide it.
Reply only
mailsi never sends new mail on its own. Recipients you add by hand in Gmail skip mailsi.
No message content stored
Only forwarding records (time, result and size) are kept, deleted after 30 days.
Daily cap
Free allows 200 forwards per domain a day. Beyond that mail is deferred and senders retry.
Pricing
Free is enough to start
Pro and Max are not launched yet. Join the waitlist and we will tell you when they launch.
ProComing soon
HK$18/month
- @mailsi.dev addresses
- 5 (at least 3 characters)
- Custom domains
- 5
- Aliases per domain
- Unlimited
- Catch-all
- Included
- Forwards per domain a day
- 5,000
- Replies a day
- 200
- Attachments
- 25 MB
- Recipients per alias
- 3
MaxComing soon
HK$58/month
- @mailsi.dev addresses
- 20
- Custom domains
- 30
- Aliases per domain
- Unlimited
- Catch-all
- Included
- Forwards per domain a day
- 20,000
- Replies a day
- 1,000
- Attachments
- 25 MB
- Recipients per alias
- 10
- Multi-member accounts
- Included
Tell me when Pro or Max launches
Leave your email and we will tell you when they launch. We only use it for launch news.
FAQ
Questions you might have
How do I start with my own domain?
Sign in, add your domain, then add one MX record at your DNS provider. It takes minutes to hours.
What does “via mailsi” mean?
Forwarded mail shows “via mailsi”. We do not hide it. The sender’s name is kept.
Do you store my mail?
No message content is stored. Only forwarding records (time, result and size) are kept, deleted after 30 days.
What if I go over the daily cap?
Mail is deferred (SMTP 451) and senders retry automatically. The cap resets at midnight Hong Kong time.
Want step-by-step DNS instructions? See the setup guides