This test will connect to a mail server via SMTP, perform a simple Open Relay Test and verify the server has a reverse DNS (PTR) record. It will also measure the response times for the mail server.

The first step to fixing a problem with your mail server is identifying which issue it is currently experiencing, by running a smtp test. This smtp test will connect to your email server and run …

All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool. Input a domain name or IP Address or Host Name. Links in the results will guide you to other relevant tools and …

Your SMTP email server does advertise support for TLS. After connecting to your mail server we issue an EHLO command to introduce ourselves and to request that your server announce which …

The MX lookup is done directly against the domain's authoritative name server, so changes to MX Records should show up instantly. You can click Diagnostics , which will connect to the mail server, …

Email servers answer connections on port 25 with a string of text called an SMTP Banner whose purpose is to announce the server and any information that the administrator would like to convey to …

We recommend performing a Reverse Lookup on the IP Address for your mail server to try to find the cause of the error. You will need to contact your ISP and ask them to setup a correct PTR record for …

Return Path hosts a widely used and highly accurate blacklist, which is an official list of email server IP addresses that show activity resembling the activity of spammers.

If the SMTP Connect test is unable to connect to your mail server after 15 seconds we will report it as an error. For optimal email deliverability it is advisable that SMTP connections should not take longer …

All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool. Input a domain name or IP Address or Host Name. Links in the results will guide you to other relevant tools and …