6.7 Multiple of Senders and Receivers Test

6.7  Multiple of Senders and Receivers Test

6.7.1        Test Design

SMTP servers may reject messages from mail server if there are too many recipients in a single email. This is because the receiving SMTP server may think that the email message is spam because of sending to a large number of users. The number of recipient uses in the same delivery can be set in the mail server configuration menu. The mail server will disconnect from the recipient server when this number has been reached, connect again and continue with the remaining recipients. This test is to ensure this offline email system can it differentiate different senders sending an email at the same time. This test performed by sending an email between two senders to one receiver which is user offlineA and user offlineB to user onlineC, three senders to one receiver which is user offlineA, user offlineB and user onlineD to user onlineC, one sender to two receivers which is user offlineA to user onlineC and user onlineD and one sender to three receivers which is user offlineA to user offlineB, user onlineC and user onlineD.

6.7.2        Expected Outcome

Expected outcome from this test as per below:

Test 1: User offlineA and user offlineB successfully send email to user onlineC.

Test 2: User offlineA, user offlineB and user onlineD successfully send email to user onlineC.

Test 3: User offlineA successfully send email to user onlineC and user onlineD.

Test 4: User offlineA successfully send email to user offlineB, user onlineC and user onlineD.

6.7.3        Test Result

Test result for multiple sender and receiver sending and receiving email at the same time through infomediary device with DTN based technique shown in the Table 6.6. Test result is produced by actual conduct test.

Test	Number of sender	Number of receivers	Email delivery result
1	2	1	Send email success
2	3	1	Send email success
3	1	2	Send email success
4	1	3	Send email success

Table 6.6: Multiple sender and receiver test result