Connection to target server

Shows whether SEPPmail Cloud can connect to customer's target server. Failure to connect indicates wrong server or server outage. In such cases, SEPPmail Cloud will not be able to deliver mail.

SMTP Banner

SMTP Banner of the target server. Any code other than 2xx indicates an error on the target server.

Cisco PIX detection

If the target server is a Cisco PIX, we highly recommend to switch off "SMTP Fixup".

SMTP EHLO response

Response to EHLO request. It should display features supported by target server. Any code other than 2xx indicates an error on the target server.

SMTP status message after STARTTLS

Response to STARTTLS request. Any code other than 2xx indicates an error on the target server.

SHA1 checksum of SSL certificate

SHA1 checksum of the target server's SSL certificate.

Canonical name of SSL certificate

Canonical name for which SSL certificate of target server was issued.

Issuer of SSL certificate

Name of issuer of SSL certificate.

SubjectAltNames of SSL certificate

Alternative names for which SSL certificate is valid.

Expiration of SSL certificate

Date and time of SSL certificate expiration.

Current SSL certificate

Is SSL certificate currently valid or already expired?

SSL version

SSL version used for this connection.

SSL cipher

SSL cipher used for this connection.

SSL Magic Bits

SSL magic bits used for this connection.

SMTP EHLO response (after STARTTLS)

Response to our EHLO request. It should display features supported by target server. Any code other than 2xx indicates an error on the target server.

MAIL FROM

Envelope sender address used for this test.

RCPT TO

Envelope recipient address used for this test. Postmaster and Abuse should be accepted. A random generated address should be rejected (recipient filtering).

Greylisting detected

Message delivery can be delayed if target server uses greylisting.

SPF check detected

Mail will be lost if target server performs SPF checks. If SPF check is detected, we highly recommend to disable it on the target server. If no SPF check was detected, it is best to leave it switched off.

SMTP DATA response

Response to DATA request. Any code other than 2xx indicates that mail was not accepted and should be considered an error of the target server.

SMTP QUIT response

Response to QUIT request. Any code other than 2xx indicates an error on the target server.

Test aborted

Test could not be completed. The server's message should point to the reason.

Connection error

Error while connecting or performing the test. The error message should point to the reason.

SMTP Test error

Please report error message, target server and recipient to support@seppmail.ch.

SMTP log

Detailed log of SMTP test transaction.

Recipient filtering

Recipient filtering should always be enabled on target server. This allows for proper count of active users, prevents backscatter or spam to inactive users.

SPF Check on target server

Mail will be lost if target server performs SPF checks. If SPF check is detected, we highly recommend to disable it on the target server. If no SPF check was detected, it is best to leave it switched off.

Open Relay Check

An open relay accepts mail from any sender to any recipient. Once detected by spammers this server will be abused and risks getting listed by blocklists. An open relay is the most critical misconfiguration and must be fixed immediately.

MX points to SEPPmail Cloud

Domain's MX record should point to Cloud (customerid.gate.seppmail.cloud).

Number of MX records

SEPPmail Cloud filtered domains should have exactly one MX record.

MX resolvable

Verify domain's MX record is DNS resolvable.

A record of target server

A record (IPv4 address) of target server.

PTR of target server's IPv4

PTR record (reverse DNS) of target server's IPv4 address.

AAAA record of target server

AAAA record (IPv6 address) of target server.

PTR of target server's IPv6

PTR record (reverse DNS) of target server's IPv4 address.