Re: limit on attachment in mail to list
On Thu, Nov 09, 2023 at 01:47:01PM +0000, Byung-Hee HWANG wrote:
> On Thu, Nov 09, 2023 at 02:04:39AM -0500, hlyg wrote:
> > list doesn't seem to accept my mail, because of big attachment i believe
> >
> > what is max size of attachment allowed in list? Thanks!
> This is my guess:
>
> <quote>
> 220 bendel.debian.org ESMTP Postfix
> ehlo penguin
> 250-bendel.debian.org
> 250-PIPELINING
> 250-SIZE 30720000
> 250-STARTTLS
> 250-ENHANCEDSTATUSCODES
> 250-8BITMIME
> 250 CHUNKING
> quit
> 221 2.0.0 Bye
> </quote>
>
> So 30720000 bytes?
That looks like an upper limit on the total message size, not the size
of a MIME attachment inside the message.
Restrictions on the message content (such as attachment size limits)
would have to be enforced by something that parses the message body.
SMTP receivers usually don't do that (although they may hand the message
off to an anti-virus scanner or something which does).
The OP claimed they never received a bounce, so presumably their message
was simply dropped into the bit bucket when it failed whatever criteria
were applied. This is sensible behavior in any kind of post-SMTP
processing, although it's super frustrating for a legitimate sender who
now has no idea why their mail disappeared.
So, only the list admins would know the answer.
As a general policy, I would *never* attach an image to any email sent
to this list, regardless of size. This list should remain text only.
If you absolutely have to send an image (photo of a misbehaving X server
or whatever), your best bet would be to host the image on your personal
web server or possibly on some global image-sharing web site (although
very few of these are suitable), and include a URL to it in your email.
Reply to: