I'm sure I read recently that it was possible to change the maximum number of emails that can be sent using the transactional mail in CiviCRM. Did I imagine this or can the hard coded limit of 50 be set to another value?

  • I am not sure where you can change the limit of sending 50 transactional emails in one go....but I would like to warn you that if you change that limit the chances of getting blacklisted will increase! Oct 28, 2017 at 10:53

1 Answer 1


It's recommended to use CiviMail for larger mailouts. It's worth understanding the potential consequences of using "simple CiviCRM mail" to do mails in bulk; eg:

  • Harming your own site's spam reputation by sending many emails without spam compliant unsubscribe links.
  • Harming CiviCRM platform email reputation by using CiviCRM without respect to spam compliance.
  • Timeouts and performance issues when trying to deliver large numbers of emails in a single request.
  • ... ?

So, this has long been hard-coded in an attempt to avoid people changing it. The limit is no longer hard-coded; it's become a hidden setting: simple_mail_limit. You should be able to change this setting from the default either by using the CLI tool cv:

cv api setting.create simple_mail_limit=99

Or by adding a setting override in civicrm.settings.php:

global $civicrm_setting;
$civicrm_setting['other']['simple_mail_limit'] = 99;

See configuring hidden settings in CiviCRM for more info, and do take note of advice here to reflect on why you think you need to change this value!

  • 2
    I highly recommend understanding why this isn't a setting exposed for easy configuration; good starting points may be CRM-20905: Simple mail : Make max emails a hidden config instead of hardcoded value set to 50, PR discussion #10693 (Not sure if the extension mentioned here to expose the setting as UI exists?) and PR discussion #10705 Oct 28, 2017 at 20:16
  • Many thanks for your response(s). I fully understand the rationale and consequences. However I have one user who needs to send to a small group of a little over 50 contacts and I need to humour him! Now that we are using Mosaico there is no real difference to send using the bulk or transactional email. Given your response I am now able to make up my own mind about the way that we approach this. Oct 29, 2017 at 11:07
  • 2
    Great! And yeah, I agree this may fit your situation well - this is a community resource and I'm also writing with future readers in mind who might not recognise the difference between using CiviCRM's direct and bulk mail systems if the warnings aren't clear :D If this response was helpful, please remember to mark the answer accepted - this will help future people in your situation to resolve the same! Oct 29, 2017 at 20:04

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