Calculate the size, time and throughput of email message from Thunderbird

Hi,

I have 2 accounts set-up on Thunderbird client. I will be sending a email from user1 to user2.

Can someone please tell me that how can I calculate the
1. Email size when sent from user1.
2. Email size received by user2.
3. Why was the size of the email different in "Sent items of User1" and "Inbox of User2".
4. How much time did email took to reach from user1 to user2.
5. What is the throughput?

Is there any open source or commercial tool available to calculate this information?

Kindly provide me with solution ASAP.

Thanks
searchsanjaysharmaAsked:
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Dave BaldwinFixer of ProblemsCommented:
I don't believe there is a tool for any of that.  When you send an email, the SMTP server adds lines to the headers of the email message that increase that overall size that the receiver sees.  Sometimes there are relay servers along the path and they add info to the message also.  

The time it takes depends on how busy your SMTP server is, how busy the receiving server is and how long the path is to get there, and how much other network traffic there is along the path.  And many email systems scan incoming emails for spam and viruses which takes a little time.  When they are receiving a lot of email, that can back up and slow down your email.

Basically, no one person or place has all the info that would be needed to answer your questions.  I have sent emails from my different accounts that took from 1 second to 4 hours to get to another of my accounts.  And when I've been testing, sometimes the second email will arrive before the first one!
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