Email Magnifier
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Email Magnifier email test process algorithm explained
How we verify an email address
We check the email address syntax.
We check if domain name exists in
DNS
.
We check if domain has
MX records
.
If the
'Check negative response possibility'
option was chosen, the system will check the test possibility on the
MX record
with higher priority.
When the connection to the
SMTP server
failed, we try to connect to the next server by priority.
If the
'Analyze all MX records'
option was selected, the system will check the test possibility on all
MX records
on the server.
We check the email address on the
MX record
with higher priority (see the Procedure of
email address verification
).
When the connection to the
SMTP server
failed, we try to connect to the next server by priority.
If the
'Analyze all MX records'
option was selected, the system will check the test possibility on all
MX records
on the server.
The procedure of email address verification
We connect to
SMTP server
.
We check the
'HELO'
command.
We check the
'MAIL FROM'
command.
We check the
'RCPT TO'
command.
We check the
'QUIT'
command.
We rank the email address by the
email rank
.
We make the
email address recommendation
.
Analyze all MX records
When you choose this option the email analyzing process tests the email address in all
MX records
of this domain. This option can add processing time.
When this option is not selected we check only one
MX record
with the highest priority.
Check negative response possibility
When you choose this option we generate and test random false email address (see the procedure of
email verification
),
and if the
SMTP server
returns an answer (by
'RCPTTO' command
) that this email address does not exist,
we can be sure that when checking the email address that interests us we will get a true answer.
If the server returns an answer that this false email address does exist, when checking an email address that interests us, we cannot be sure that the
SMTP server
response will be true.
When the option 'Check negative response possibility' is not selected we cannot be sure that
SMTP server
returns a true answer.
Email address rank
The email address rank indicates the validity of email address. This is an aggregation data of all the tests.
This data indicates you if the email address exists or not and what exactly failed during the process of the verification.
Code
Description
0
The email address exist.
1
Invalid email address syntax.
2
The domain does not exist.
3
MX records
not found.
4
The
MX record
is unavailable.
5
Connection
failed.
6
'HELO'
failed.
7
'MAILFROM'
failed.
8
The email address does not exist.
9
'RCPTTO'
is not clear.
10
'RCPTTO'
does not support negative response.
11
'RCPTTO'
email account is over quota.
12
Undefined.
Email address recommendation
The email recommendation is our interpretation of the rank given to the email address at the end of the verification process.
Description
The email address exist.
The email address does not exist.
It is impossible to make a clear decision.
Options of the response given for the email address verification
Online Single Email Address Test
On the screen
Online Bulk Email Address Test
On the screen
Download excel file
Download json file
Manual Email Address Test Task
Download excel file
Download json file
Api Email Address Test Task
json format message sent to http provided
Data provided in our response
Email address syntax is
valid / invalid
Domain name
exist / does not exist
MX record
exist / does not exist
If
SMTP server
supported negative response.
Connection Response
HELO Response
MAIL FROM Response
RCPT TO Response
QUIT Response
Email rank
Email address recommendation
We come to the conclusion analyzing all the data received during the test.
As we provide you this information as well, you can come to the conclusion by yourself, and your conclusion may or may not be similar to ours.
Email Magnifier.
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