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Can we limit inbound attachment size?

Jim Idelson
 

We're just getting our group started. There is some discussion about attachments. I see we can set a group policy for the maximum size of attachments that a member will receive by email, which individual members can choose to override. Is there a way to limit the size of attachment that a member can post to the group? We'd like to have more control over attachment sizes so we don't run up our storage usage and so we don't have members receiving mega-messages because they unwittingly set their personal attachment size limit to unlimited.

Thanks,

Jim
 

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> We're just getting our group started. There is some
>?discussion about attachments. I see we can set a group
>?policy for the maximum size of attachments that a member
>?will receive by email, which individual members can choose
>?to override. Is there a way to limit the size of attachment
>?that a member can post to the group?
?
Yes, there are several controls you can set. Under Administration > Settings, under the first 'Settings' button, scroll way down to "Photos". You can set who can view and upload to the group photos section.
?
You can also set a 'Max Size In Photos Section' which will automagically resize photos uploaded to the photos section that are larger than a specific size.
?
You can also set 'Max Size In Email' which automagically resizes photos to below a set size for photos sent in emails.
?
Dano
 

Jim,

Is there a way to limit the size of attachment that a member can post
to the group?
There is for photos, sort-of, but not for attachments. That's probably because for photos the limit is expressed in pixel dimensions and photos over the limit can be automatically resized to fit. With file attachments the only options would be to strip them or bounce the message.

Or... force the message to the pending queue and defer the choice of stripping, rejecting, or accepting them to the moderator's case-by-case judgment. So I guess those weren't the only options.

The only objection I can see to implementing this feature would be an argument against the added complexity. But that generally hasn't been stopping Mark from implementing good ideas.

Shal
Jim Idelson
 

Thanks,?Shal and Dano, for your comments.

We've already throttled back the photo sizes to 488x488 for emails, and 1024 for other image uploads. Our focus is now on managing other kinds of document attachments.

I would support the option to set a hard limit, which would simply strip the attachment or bounce the message back to sender. Giving the go/no-go option to a Moderator is a kinder, gentler approach, but it does add more admin work for us managers. I also think there's good precedent from every email provider out there to reject messages with an attachment that's just too big.

Best,

Jim

On Fri, Oct 27, 2017 at 2:59 PM, Shal Farley <shals2nd@...> wrote:
Jim,

> Is there a way to limit the size of attachment that a member can post
> to the group?

 There is for photos, sort-of, but not for attachments. That's probably because for photos the limit is expressed in pixel dimensions and photos over the limit can be automatically resized to fit. With file attachments the only options would be to strip them or bounce the message.

Or... force the message to the pending queue and defer the choice of stripping, rejecting, or accepting them to the moderator's case-by-case judgment. So I guess those weren't the only options.

The only objection I can see to implementing this feature would be an argument against the added complexity. But that generally hasn't been stopping Mark from implementing good ideas.

Shal






--
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73 Jim K1IR
 

Is there a way to limit the size of attachment that a member can post
to the group?
Isn't a photo an attachment?
Does Groups.io always differentiate between photo files, (jpg, etc.) and non photo files so that it can selectively limit photos if the appropriate box is checked in the group's configurfation?
Also, don't most email servers limit max content size?? I think gmail maxs you out if your message's total size is 10megabytes.
--
Bob Bellizzi

The Corneal Dystrophy Foundation
 

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On Oct 27, 2017, at 3:06 PM, Bob Bellizzi <cdfexec@...> wrote:

Also, don't most email servers limit max content size?? I think gmail maxs you out if your message's total size is 10megabytes.
Actually it's I think 25 mb or something like that.?It's quite generous, well, sort of. I use mail butler to upload my stuff to the cloud and people just get a link when I send the message.?That ?I can go upto 4 gigs with that.
 

Bob,

Isn't a photo an attachment?
That turns out to be a deeper question than you might think.

If the email is plain text only, then yes. An attached file is the only way a photo can go with.

If the email is formatted (text/html) then maybe. The image file could be carried along as an attachment, or it could be remotely referenced from a server (not in the email at all), or it could be in a data: parameter inside the HTML message body (this feature is new-ish).

Does Groups.io always differentiate between photo files, (jpg, etc.)
and non photo files so that it can selectively limit photos if the
appropriate box is checked in the group's configurfation?
Yes. Or at least I think if it misses one that could be a reportable bug.

Also, don't most email servers limit max content size?
Yes, there are usually limits both outbound and inbound. That used to be a major sticking point when the limits were relatively small - and led to the creation of sites like Dropbox to overcome the email limit.

Some email services even had (have?) automatic management of large attachments, whereby if you try to send too large an attachment the service will store it for you and pass a link to it in your outbound message.

Shal

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