[Bug 9646] New: Sendmail allow "+" symbol in recipient

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=9646

            Bug ID: 9646
           Summary: Sendmail allow "+" symbol in recipient
           Product: Busybox
           Version: unspecified
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Networking
          Assignee: unassigned at busybox.net
          Reporter: oli at glow.li
                CC: busybox-cvs at busybox.net
  Target Milestone: ---

Created attachment 6881
  --> https://bugs.busybox.net/attachment.cgi?id=6881&action=edit
Patch to add the "+" symbol to the allowed characters. This applies to v 1.26.2

Some email addresses, most notably mailing lists, have a "+" in the email
address (Example: listname+subscribe at domain.tld), but sendmail only allows
alphanumeric and "_-.@".
I have attached a patch that adds the "+" symbol to this list.

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