Notify users of excessive attachment size

[georgechen]

Hi folks,

I have previous raised a question about inbound action script that prevents excessive attachment from attaching.   After attempting to implement the script, I realised ServiceNow seems to stop the email from processing if an attachment is over-sized   ( Email.attachment.size >= glide.email.inbound.max_total_attachment_size_bytes : default 16m)

Therefore the script would never seem to be reached if the size condition is met, but following would be a plan to achieve this

1) Change the value of glide.email.inbound.max_total_attachment_size_bytes to 10485760 (100m)

2) Create a new sys_properties of test.email.inbound.max_total_attachment_size_bytes and set value to (16m)

3) Create Inbound Action Script including the code below

If attachment is over 16 mb and less than 100m, it will fires off 'systems_email_oversize.bounce', notifying the sender that the attachments are not attached.

Any advice would be appreciated.

Kind regards,

		var max_attach_bytes = gs.getProperty('test.email.inbound.max_total_attachment_size_bytes');
		//total attachments size
		var total_size=0;
		var att = new GlideAggregate('sys_attachment');
		att.addEncodedQuery('table_sys_id=' + eml.sys_id);
		att.addAggregate('SUM', 'size_bytes');
		att.query();
		if (att.next())
			total_size = att.getAggregate('SUM', 'size_bytes');
		// if total size exceeds the maximum limit, fires off the bounce event
		if (total_size >= max_attach_bytes)
			gs.eventQueue('systems_email_oversize.bounce', null, email.origemail, email.subject);

[shahidkalaniya]

Thank you soo very much George! This was really helpful.

Highly appreciate you taking your time out and providing such detailed documentation on the matter.

Considering the performance issue, i have decided to go with the Scheduled script approach. Hope it works fine.

Many thanks once again

Regards,

Shahid Kalaniya

[eglazier]

OK, the may be old and hopefully someone will reply.

Given the above information, my question is will the Sender be notified that the email was rejected / bounced?

If so, what to the emails look like?  As my customers are claiming they aren't getting anything back.

If not, then what is the reason users aren't being notified.

Thank You.

[Dub Myers]

As of New York, any inbound email having attachments discarded due to exceeding attachment size or count limits will get an event logged 'inbound_email_attachments.discarded', with the email record as the target record of the event.

That means anyone wanting to notify a user can do so by responding to this event and deriving the email address of the sender from the email record.

Warning: You should ensure the emails you are auto-responding to (for this reason or any others) are for situations that make sense for your use case. For example if a spammer sent an email to your instance email address, having an unintelligent auto-response on this kind of error may auto-respond to the spammer, which is quite likely not something you want to do.

So, when handling this event, an example check might be that the sending email address is an allowed sender Another check could be that the ServiceNow spam/virus headers are not present.

[Dub Myers]

As of New York, any inbound email having attachments discarded due to exceeding attachment size or count limits will get an event logged 'inbound_email_attachments.discarded', with the email record as the target record of the event.

That means anyone wanting to notify a user can do so by responding to this event and deriving the email address of the sender from the email record.

See documentation.

Warning: You should ensure the emails you are auto-responding to (for this reason or any others) are for situations that make sense for your use case. For example if a spammer sent an email to your instance email address, having an unintelligent auto-response on this kind of error may auto-respond to the spammer, which is quite likely not something you want to do.

So, when handling this event, an example check might be that the sending email address is an allowed sender. Another check could be that the ServiceNow spam/virus headers are not present in the email.