incoming mail server for a .mac email on windows 10

Popular internet-based email services differ in the use of IP addresses in email headers.

An MIT graduate who brings years of technical experience to articles on SEO, computers, and wireless networking.

Ryan Perian is a certified IT specialist who holds numerous IT certifications and has 12 years experience working in the IT industry support and management positions.

Internet emails are designed to carry the IP address of the computer from which the email was sent.

This IP address is stored in an email header that is delivered to the recipient along with the message.

Email headers contain the electronic equivalent of addressing and postmarks that reflect the routing of mail from source to destination.

However, headers are always delivered along with the message contents.

Most email clients provide an option to enable the display of these headers if desired.

Some lines are labeled as Received followed by the IP addresses for the sending (from) email server and the receiving (by) email server, such as in the following fictitious example.

Received: from teela.mit.edu (65.54.185.39) by mail1.aol.com with SMTP; 30 Jun 2003 02:27:02 -0000.

These lines of text are automatically inserted by email servers that route the message.

If only one Received line appears in the header, you can be confident this is the actual IP address of the sender.

In some situations, however, multiple Received lines appear in an email header.

This happens when the message passes through multiple email servers.

Some email spammers insert additional fake Received lines into the headers to confuse recipients.

To identify the correct IP address when multiple Received lines are involved requires a bit of detective work.

If no faked information was inserted, the correct IP address is contained in the last Received line of the header.

This is a simple rule to follow when looking at mail from friends and family.

If faked header information was inserted by a spammer, different rules are applied to identify a senders IP address.

The correct IP address isnt contained in the last Received line because information faked by a sender appears at the bottom of an email header.

The by location listed in each Received line should match the from location listed in the following Received line.

The last Received line containing valid information contains the senders true address.

In these cases, all Received header lines except the first one are faked.

The first Received header line contains the senders true IP address in this scenario.

Incoming Mail Server For A .Mac Email On Windows 10