[Users] [Bug 3366] Bad recipient address syntax (SMTP RCPT TO)

[noreply at thewildbeast.co.uk]

http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3366

--- Comment #2 from Hagen Riedel <hagen_riedel at gmx.de> ---
I would follow up with Andrej's guess. As user usually does not focus on some
missing quotes bug report has to be regarded invalid.

My test also shows the behaviour described when removing quotes. It even
appears when just removing the leading quote! When I delete the trailing quote
only the client displays a message window "Error: Could not queue message for
sending."

At the first glance I assumed a server-side cause of trouble. To this effect
some more precise syntax check and user messaging may significantly improve
usability.

By the way: Another guess was that there occured some text conversion as
sophisticated software sometimes tries to interpret/convert data according to
special locale (e.g. "quote" is typeset as „quote“). This hypothesis has to be
dropped as my tests reveal that for any character other than a double quote
(ASCII Code 0x22) it is interpreted as part of the mail address and written to
the log, e.g.:
> [12:20:11] SMTP> RCPT TO:<˝Hagen Riedel>
> [12:20:11] SMTP< 501 5.1.3 Bad recipient address syntax
> ** error occurred on SMTP session
> *** Error occurred while sending the message:
> 501 5.1.3 Bad recipient address syntax
It remains solely imaginable that somehow the quotes have been stripped as
invalid characters for the data type of some variable/container.

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