SMTP client shows BCC recipients in sent e-mails

[aartjan]

I have had similar trouble with the NI SMTP client before (link). Now I figured out that the recipients from BCC field are exposed in the sent e-mail. Therefore, recipients can see all other recipients. At least in the couple of tests that I did. Nothing much one can do wrong with this test, as you only have to enter one or more recipients in the following VI:

I tested with lv 2015 & 2017 32 bits. I only used my domain smtp server for now.

I hope someone can advise me on a more robust solution to replace SMTP, or this SMTP library.

[MStewart]

I have the same result using the NI SMTP client, but was successful in hiding the BCC recipients by modifying the Gmail example found here:

http://www.ni.com/example/30992/en/

I changed the 'MailMessage' property node from 'CC' to 'Bcc' and sent an email from an Office 365 address to multiple recipients, without revealing other recipients addresses.

[aartjan]

Thanks for the alternative solution! I'll give it a go.

Still, a Labview built-in toolkit should not have such quirks

[billko]

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@aartjan wrote:

Thanks for the alternative solution! I'll give it a go.

Still, a Labview built-in toolkit should not have such quirks

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I wouldn't call that a "quirk" - I'd call it a "bug" - and a potentially devastating one, at that.  Not devastating code-wise, but ramification-wise.

[aartjan]

My test was not conclusive enough for me to claim it to be a bug. But if others can concur, then it sure is one.