Re: Mime recursion-depth is limited to 64

On 09/25/2013 05:38 PM, Paul J Stevens wrote:
> There is a very big difference between the number of attachments and the
> recursions depth of attachments.
>
> The number of attachments is and always has been unlimited.

Got that, thanks for clarification.

> Are you telling me that you see recursion depth > 64 in the wild? It's
> theoretically possible of course, but do such messages actually occur?
>
> Keep in mind that many virus/spam scanners don't like very deep
> mime-structures.
>
> If anyone is stuffing attachments inside attachments, inside
> attachments, etc to a depth of over 64, I'd like to see it. And no, I
> don't give a f*ck about mail-loops that include the original message as
> an attachment.

I've got a db dump from one of our customers:

mysql> select max(part_depth) from dbmail_partlists;
+-----------------+
| max(part_depth) |
+-----------------+
|             242 |
+-----------------+
1 row in set (0.69 sec)

mysql> select * from dbmail_partlists where part_depth = 242;
+----------------+-----------+----------+------------+------------+----------+
| physmessage_id | is_header | part_key | part_depth | part_order | part_id  |
+----------------+-----------+----------+------------+------------+----------+
|        3617138 |         1 |      966 |        242 |          0 | 16509340 |
|        3617138 |         0 |      966 |        242 |          1 | 16509341 |
|        3617138 |         1 |      967 |        242 |          0 | 16509342 |
|        3617138 |         0 |      967 |        242 |          1 | 16509805 |
+----------------+-----------+----------+------------+------------+----------+
4 rows in set (0.96 sec)

I'll try to figure out what kind of message is that.

-- 
Best regards,
Pavlo Lavrenenko,
PortaOne, Inc., Junior Software Developer
Tel: +1-866-SIP VOIP (+1 866 747 8647) ext. 7624

PortaOne - VoIP Solutions Company
Visit our Website: http://www.portaone.com