Why is domain name being appended to simple string in To: field of email message (SMTP)
I am testing an SMTP mail server and I wanted to know what happens if I put just plain text as the To: text, rather than a valid email address. In other words, the test message looked like this:
mail from:<example@abc.com>
rcpt to:<myselfr@mydomain.com>
data
To: some-text
From: more-text
Subject: Test email #1
Email to test non address in To/From fields
.
The resulting email had the From and To fields like this:
To: some-text@mydomain.com
From: more-text@mydomain.com
It appeared that the either mail client or SMTP server was appending the recipient's domain to the plain text in the To/From fields.
I had thought that everything in the data part of the message (inside the "envelope" was just whatever the sender wanted to put there. Why/How is it getting modified, and is that modification by the sending server, receiving server or the mail client?
I also tried sending an email with no To/From information at all and in the mail client To: was blank and From: had the rcpt to: information.
email smtp protocols
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
add a comment |
I am testing an SMTP mail server and I wanted to know what happens if I put just plain text as the To: text, rather than a valid email address. In other words, the test message looked like this:
mail from:<example@abc.com>
rcpt to:<myselfr@mydomain.com>
data
To: some-text
From: more-text
Subject: Test email #1
Email to test non address in To/From fields
.
The resulting email had the From and To fields like this:
To: some-text@mydomain.com
From: more-text@mydomain.com
It appeared that the either mail client or SMTP server was appending the recipient's domain to the plain text in the To/From fields.
I had thought that everything in the data part of the message (inside the "envelope" was just whatever the sender wanted to put there. Why/How is it getting modified, and is that modification by the sending server, receiving server or the mail client?
I also tried sending an email with no To/From information at all and in the mail client To: was blank and From: had the rcpt to: information.
email smtp protocols
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
add a comment |
I am testing an SMTP mail server and I wanted to know what happens if I put just plain text as the To: text, rather than a valid email address. In other words, the test message looked like this:
mail from:<example@abc.com>
rcpt to:<myselfr@mydomain.com>
data
To: some-text
From: more-text
Subject: Test email #1
Email to test non address in To/From fields
.
The resulting email had the From and To fields like this:
To: some-text@mydomain.com
From: more-text@mydomain.com
It appeared that the either mail client or SMTP server was appending the recipient's domain to the plain text in the To/From fields.
I had thought that everything in the data part of the message (inside the "envelope" was just whatever the sender wanted to put there. Why/How is it getting modified, and is that modification by the sending server, receiving server or the mail client?
I also tried sending an email with no To/From information at all and in the mail client To: was blank and From: had the rcpt to: information.
email smtp protocols
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
I am testing an SMTP mail server and I wanted to know what happens if I put just plain text as the To: text, rather than a valid email address. In other words, the test message looked like this:
mail from:<example@abc.com>
rcpt to:<myselfr@mydomain.com>
data
To: some-text
From: more-text
Subject: Test email #1
Email to test non address in To/From fields
.
The resulting email had the From and To fields like this:
To: some-text@mydomain.com
From: more-text@mydomain.com
It appeared that the either mail client or SMTP server was appending the recipient's domain to the plain text in the To/From fields.
I had thought that everything in the data part of the message (inside the "envelope" was just whatever the sender wanted to put there. Why/How is it getting modified, and is that modification by the sending server, receiving server or the mail client?
I also tried sending an email with no To/From information at all and in the mail client To: was blank and From: had the rcpt to: information.
email smtp protocols
email smtp protocols
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
asked Nov 25 '18 at 18:53
Tyler DurdenTyler Durden
7,12773892
7,12773892
add a comment |
add a comment |
1 Answer
1
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oldest
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It is based on assumption that domain-less email address referrers to "this mail server".
MTA/SMTP server "fixes" the addresses to make them valid on other servers e.g. after forwarding.
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
add a comment |
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1 Answer
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active
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It is based on assumption that domain-less email address referrers to "this mail server".
MTA/SMTP server "fixes" the addresses to make them valid on other servers e.g. after forwarding.
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
add a comment |
It is based on assumption that domain-less email address referrers to "this mail server".
MTA/SMTP server "fixes" the addresses to make them valid on other servers e.g. after forwarding.
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
add a comment |
It is based on assumption that domain-less email address referrers to "this mail server".
MTA/SMTP server "fixes" the addresses to make them valid on other servers e.g. after forwarding.
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
It is based on assumption that domain-less email address referrers to "this mail server".
MTA/SMTP server "fixes" the addresses to make them valid on other servers e.g. after forwarding.
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
answered Nov 25 '18 at 22:19
AnFiAnFi
8,00831740
8,00831740
add a comment |
add a comment |
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