Add -f flag to rm command in v-add-mail-domain-smtp-relay to avoid error if ip file does not exist (#5086)

bin/v-add-mail-domain-smtp-relay

@@ -54,7 +54,7 @@ port:$port
 user:$username
 pass:$password
 EOL
-rm $HOMEDIR/$user/conf/mail/$domain/ip
+rm -f $HOMEDIR/$user/conf/mail/$domain/ip
 
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