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The Technical Zone... The Geeky forum... Use this forum to discuss technical aspects of email, from authentication protocols to encryption.

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Old 13 Oct 2017, 10:38 AM   #1
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Join Date: Oct 2017
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Receiving mail with To address = From address

Is there any e-mail client that will filter a message where the To address and the From address are the same? ( I use Thunderbird where that is not possible)
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Old 16 Oct 2017, 04:55 PM   #2
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That sort of filter will get the mail clients access to read you mail content which might cause security concern. It seems better that none of the clients avail such a facility.
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Old 28 Oct 2017, 08:21 PM   #3
The "e" in e-mail
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Originally Posted by lyles View Post
I don't think it is possible to receive the message if from and to address is same.
Yes, this is perfectly possible. Just try it....
A legitimate use of such a message would be to send something to a number of Bcc recipients.
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Old 29 Oct 2017, 04:21 AM   #4
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The email standards (such as RFC 2822) do not require a To address. So it's perfectly acceptable to send a message to one or more Bcc recipients with no To or Cc recipients. Some email clients (or webmail systems) do not allow this and force a To address to be included, but many (such as Fastmail) do not require a To address.

Spammers often set their From address to be the same as the recipient address. So some email systems block (or add a spam score) to messages where From == To. For example, Fastmail does not block such messages but address book whitelisting is disabled when From == To.

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