How to know mail server

There are several ways to determine the mail server for a domain:

  1. MX Record Lookup: You can use a DNS lookup tool or a website like MXToolbox or WhatIsMyMXRecord to look up the MX records for a domain. MX records point to the mail server responsible for receiving email for a domain.
  2. Email Client Configuration: Check the email client configuration settings for the domain. For example, in Microsoft Outlook, you can check the "More Settings" button in the account settings and look for the "Outgoing mail server" or "SMTP server" setting.
  3. Domain Registrar: Check the domain registrar's website or contact their support team to ask about the mail server settings for the domain.
  4. WHOIS Lookup: Perform a WHOIS lookup on the domain to get information about the domain's registration, including the mail server settings.
  5. Email Header Analysis: Analyze the email headers to determine the mail server that sent the email. You can use tools like Mail-Header or Email Header Analyzer to do this.
  6. Check the Domain's DNS Records: Check the domain's DNS records to see if there are any mail server records (MX, SPF, DKIM, etc.) that can help you determine the mail server.
  7. Contact the Domain Owner: If all else fails, you can contact the domain owner or administrator directly to ask about the mail server settings for the domain.

Some common mail server protocols and ports:

Keep in mind that some mail servers may use alternative ports or protocols, so it's always a good idea to check the specific settings for the domain you're interested in.