[imp] attachments > 9 MB need memory_limit = 200M ??!

[Kevin M. Myer]

I had similar issues (see
http://marc.theaimsgroup.com/?l=imp&m=104221588724492&w=2) and as I recall, the
issue is that the Net_SMTP PEAR module ends up using a lot of resources when
dealing with a lot of strings (i.e. and attachment).

Look at bug # 1162 (as well as #1206, which is the exact same thing).  Your only
recourses are:

1) Rewrite the Net_SMTP to be more resource effecient or,
2) Boost your PHP memory_limit to something (IMHO) outrageous, like 400Mb of
memory.

Unfortunately, I don't have the expertise to do 1) and option 2) is a denial of
service waiting to happen and genuinely bad practice.  I recall some discussion
(on the list or via bug postings) about not using email for large attachments
but (once again, IMHO), a 10Mb attachment isn't all that large, plus there are
other non-technical (i.e. political) pressures to let such large attachments go
through.

Actually, now that I think about it, you could probably also use the sendmail
binary directly, instead of using SMTP as your ['mailer']['type'], which
provides a third option, to the two above.

Kevin

> ----- Message from krause at biochem.mpg.de ---------
>     Date: Wed, 28 May 2003 22:44:22 +0200
>     From: Markus Krause <krause at biochem.mpg.de>
> Reply-To: Markus Krause <krause at biochem.mpg.de>
>  Subject: [imp] attachments > 9 MB need memory_limit = 200M ??!
>       To: imp at lists.horde.org
>
> hi all,
>
> i am using the cvs snapshot 2003-05-28 of horde/imp/[...] with apache 1.3.27
> and
> php 4.3.1
>
> in php.ini i have:
>
>   max_execution_time = 120
>   max_input_time = 240
>   memory_limit = 100M
>
> if i attach a file until (about) 9 mbytes i can send emails without any
> problems, but as of 10 mbytes the attachments have the size zero (likely a
> similar error than reported by others)
>
> but if i change the settings in php.ini to
>
>   memory_limit = 200M
>
> i can send (at least) attachments with 15 mbyte! (unfortunately several users
> in
> our network do send files of that size regularily!)
>
> does anyone know why the memory usage does "explode" that much? how much do i
> need then for 25 mbyte (thats the limit of our mailserver, its horrible but
> the
> users demand this and we have to provide this!)? is there a "formular"?
>
> thanks in advance for your help!
>
>    markus krause
>
> --
> Markus Krause                           email: krause at biochem.mpg.de
> Max-Planck-Institute of Biochemistry    phone: +49-89-8578-2825
> Computing Center
>
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--
Kevin M. Myer
Systems Administrator
Lancaster-Lebanon Intermediate Unit 13
(717) 560-6140