Re: Message size limit

[Frank Steinmetzger]

Am Sat, Mar 04, 2023 at 04:45:07PM +0100 schrieb Robin Bannister:
> Jean Abou Samra wrote:
> > Hi,
> > 
> > We've been informed that the size of messages to this list containing large 
> > attachments is occasionally clogging up the GNU list server's mail delivery 
> > queue, causing distribution delays (not just for this list, but for 
> > everyone on the hundreds of other gnu.org lists).
> > 
> > To avoid this, your friendly list admins have configured a max message
> > size of 512KB.

> Is there any specific advice for users taking screenshots?

Crop, use the proper format¹, and optimise prior to sending. Depending on 
how (with which tool) the screenshot was made, there is lots of room for 
reducing the filesize. For that, use `optipng -o9 <filename>`. It will 
reduce the PNG colour palette and apply stronger compression settings, but 
is still lossless.

For small and medium images, PNG is of course the best option. But if a 
larger area needs to be pictued which exceeds the permitted file size, JPG 
is still good enough. It may introduce artifacts, but compresses much higher 
and the relevant info is still visible.

> Especially inline ones: those get copied when quoted, cf 2021-09.

Hm… this is an issue on the user’s side, specifically the used mail client. 
If you notice this in your own messages, select some text before opening the 
reply. The mailer will usually only quote the selected content.

> Cheers,
> Robin
> 

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