Max # of recipients possible on an outbound email

[Manan4]

Hello everyone,

Needing to confirm what is the maximum number of recipients that ServiceNow allows to be added on a single notification email. Also, is there a limit to how many records could be added to a 'List' field?

The situation I am in is like this: 

1. A List field on the Incident form to be populated by a BR with user records. I need to confirm whats the max # of entries that can be listed in this field.

2. The users in the above mentioned field are then parsed as 'BCC' recipients on a notification. The OOB Max length for this field is 4000. What's the max I can increase it to?

Further on, can the SMTP server add over 100 or 500 recipients as Blind Copied to an outbound email?

Kindly advise. 

[Allen Andreas]

Hello,

Historically, ServiceNow caps out at 100 recipients per email notification. So if you were trying to process outbound email, you'd probably have to build a solution that breaks it up into chunks to ensure they go out.

For list field, there is no limit, but you start to get in to performance issues the more that is listed.

Please mark reply as Helpful/Correct, if applicable. Thanks!

[Manan4]

Hello Allen,

Thanks for your quick response. I checked on SNOW Docs and found out about this email property

From the looks of it, should the email property automatically send the notification to the remaining number of recipients on a separate email? 

[Allen Andreas]

Hello,

This is only applicable to the "To" line. For Bcc, as you mentioned, I don't believe the same functionality works like that, hence the need to possibly break them out into chunks.

Please mark reply as Helpful/Correct, if applicable. Thanks!

[Emi0713]

Hello.

The maximum number of recipients per email notification is 1000.
ServiceNow recommends that you can specify a maximum value of 1000 for the system property "glide.email.smtp.max_recipients".

Please refer to the following document for reference.
https://docs.servicenow.com/bundle/rome-servicenow-platform/page/administer/reference-pages/referenc...

System property: glide.email.smtp.max_recipients
Type: integer
Default value: 100

Upper limit is 1000.