Yurii Kuznietsov

Attachment can be of any format. E.g. 1GB video file.

Panel notes partly resolve this problem. https://github.com/espocrm/espocrm/issues/2977

If you make account - email relationship audited, when archiving an email related to an account, it will appear in the account stream.

The solution with Workflows (proposed by Eymen) should work fine. 1. For Email entity type, create a custom field *To Send At*. Add this field to the Side Panel Fields...

If you had to nuke your instance it might be you had some different issue. I tried to reproduce the problem. 1. Created a new field. 2. Set the default...

Implemented URL-Multiple field type https://github.com/espocrm/espocrm/issues/2713.

Forced it to be placed always down, that should fix the issue.

This likely has been resolved recently.

Parameter max number per batch: https://github.com/espocrm/espocrm/issues/2930

But we have Start Date in the Mass Email. This should be enough for define when to send.