SMTP Email Sender
Send a test email through any SMTP server — set host, port, TLS and credentials, then compose and send.
SMTP server
Message
🔒 Nothing is stored. Sign in to reach private / LAN / localhost relays and save servers (password encrypted).
About this tool
A web-based SMTP client for sending email. Point it at any SMTP server (Gmail, SendGrid, Mailgun, Amazon SES, Postfix, your own relay) with host, port, TLS mode and credentials, then compose a message — From, To, Cc, subject and a plain-text or HTML body — and send it. Perfect for testing SMTP credentials, deliverability and TLS settings. Signed in, you can reach private / LAN / localhost relays and save servers that sync across devices — the password is encrypted at rest with AES-GCM. Signed out, the connection is one-time, public-host only, and never stored.
Frequently asked questions
Is my SMTP password stored?
Only if you're signed in and choose to save the server — and then the password is encrypted at rest with AES-GCM. Signed out, the connection is one-time and is never written to the database.
Which TLS modes are supported?
STARTTLS (typically port 587), implicit TLS / SMTPS (port 465), no encryption (port 25 on a trusted relay), or Auto to let the client choose based on the port.
Can I use it with a relay on my own network?
Yes, once you're signed in. Anonymous visitors can only reach public, internet-routable hosts; signed-in users can also reach private, LAN and localhost relays.