Public bug reported:
In accordance with RFC standards, certain special characters such as
'plus' (+) symbol are allowed to be used in 'local part' of email
addresses. Thus the addresses [email protected] and [email protected] are
considered to be valid.
Also, certain mail service providers such as gmail accepts as using the
'+' symbol in an address and appending any number of characters after
the 'plus' giving an option to filter the emails utilising the '+' for
filtering and all those set of email addresses with different sets of
characters after '+' yet address to a single account.
On the other hand, Mailman doesn't processes 'plus' in any special way
than a normal character and as a result two or more email addresses can
be subscribed pointing to the same account for the same mailing
list...This can cause redundancy of addresses in subscriber database and
also multiple emails might go to the same user and thus even the
important mails may be treated as spams.
** Affects: mailman
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1430559
Title:
Identical Addresses treated differently causes redundancy in address
list
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