SMTP & Email Server Tester
Send a test email and view the raw SMTP handshake.
1
Server
2
Message
SMTP Host
*
Hostname or IP of your SMTP server (e.g.,
smtp.gmail.com
).
Please provide the SMTP hostname.
Port
*
25 (Default SMTP)
587 (STARTTLS, Recommended)
2525 (Alternative)
465 (SSL/TLS)
Other (specify below)
Most setups use 587 (STARTTLS). 465 is implicit TLS.
Custom Port
Enter a non-standard port (1–65535).
SMTP Username
Your SMTP login (often your full email). Some servers require it to match “From”.
SMTP Password
Use your account password or an app password if required.
Enable SMTP debug
Show raw SMTP conversation in the report.
From Email
*
Address shown in the “From” field. Some servers restrict spoofing.
Please provide a valid From address.
To Email
*
Recipient inbox to receive the test email.
Please provide a valid To address.
Subject
Subject line for your test message.
Body
This is a test email sent from SMTP Tester
The content of the email you’ll send.
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Send Test Email