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sendmail allow "=" symbol in recipient, closes 10241

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-10-05 17:18:23 +02:00
parent 2ab9403119
commit 1121b4e568
1 changed files with 7 additions and 1 deletions
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8
mailutils/sendmail.c
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@ -150,7 +150,13 @@ static char *sane_address(char *str)
trim(str);
s = str;
while (*s) {
if (!isalnum(*s) && !strchr("+_-.@", *s)) {
/* Standard allows these chars in username without quoting:
* /!#$%&'*+-=?^_`{|}~
* and allows dot (.) with some restrictions.
* I chose to only allow a saner subset.
* I propose to expand it only on user's request.
*/
if (!isalnum(*s) && !strchr("=+_-.@", *s)) {
bb_error_msg("bad address '%s'", str);
/* returning "": */
str[0] = '\0';