What is the IP address of SMTP?

To determine the IP address of an SMTP (Simple Mail Transfer Protocol) server, you need to perform a DNS lookup to find the Mail Exchange (MX) records associated with a specific domain. The IP address associated with the MX record is your SMTP server's IP address.

Here's how you can find the IP address:

Open a Command Prompt (or Terminal).
Use the nslookup command with the -type=mx option.
- Type the following command, replacing "yourdomain.com" with the actual domain name you're interested in:
```
nslookup -type=mx yourdomain.com
```
Interpret the Results.
- The command prompt will display MX records. The IP address next to the "Mail Exchanger" is your SMTP server's IP address.

Example:

Let's say you want to find the SMTP server's IP address for "example.com". You would enter:

nslookup -type=mx example.com

The output might look something like this:

Non-authoritative answer:
example.com       MX preference = 10, mail exchanger = mail.example.com

example.com  nameserver = ns1.example.com
example.com  nameserver = ns2.example.com

mail.example.com  internet address = 192.0.2.1

In this example, 192.0.2.1 is the IP address of the SMTP server (mail.example.com) for the domain "example.com".