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SMTP check
SMTP Check
Verify the server for sending email, its security and certificates.
What does the SMTP check do?
It verifies the email server, testing the ability to receive and send email including transfer security and certificate trust.
Why monitor SMTP?
Email is a basic tool. Problems with security, delays or blacklisting lead to loss of trust and revenue.
- Ensures smooth sending and delivery.
- Protects communication against security risks.
- Maintains email infrastructure trust.
What do the individual fields mean and why do they matter?
11 fields1
SMTP server
What it meansAddress of your email server (e.g. smtp.example.com).
Why it mattersIdentifies the server and ensures it works.
2
Security
What it meansEncryption the server uses (e.g. SSL/TLS).
Why it mattersProtects email against eavesdropping or misuse.
3
Port
What it meansPort the SMTP server uses (e.g. 465 for SSL/TLS).
Why it mattersThe correct port is necessary to connect.
4
IP protocol: IPv4/IPv6
What it meansIP address type the server is reachable on.
Why it mattersEnsures compatibility across infrastructure.
5
User and Password
What it meansCredentials to authenticate to the SMTP server.
Why it mattersTests authentication configuration.
6
Connection / Response timeout
What it meansMaximum time to wait for connection or response.
Why it mattersIdentifies delays or congestion.
7
Slow (ms)
What it meansThreshold at which the response is slow.
Why it mattersWatches performance affecting delivery.
8
Certificate warning (days)
What it meansDays before SSL/TLS expiration to notify.
Why it mattersPrevents problems from an expired certificate.
9
Check certificate expiration
What it meansTests validity and expiration date.
Why it mattersEnsures the server is trusted.
10
Check certificate trust
What it meansVerifies a trusted authority issued it.
Why it mattersPrevents email security problems.
11
Check block lists (DNSBL)
What it meansTests if the server IP is blacklisted.
Why it mattersA blacklisted server may have delivery issues.
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