Re: [Exim] maildir_use_size_file

> Which Exim version?
> What does your local_delivery transport look like?

exim-4.41


virtualhost_delivery:
driver = appendfile
create_directory
maildir_format
maildir_use_size_file
maildir_quota_directory_regex = ^(?:cur|new|\.(?!Trash).*)$
maildir_tag = ,S=$message_size
directory = /path/to/mailroot/${domain}/${local_part}/Maildir
quota = ${lookup mysql{....<snipped>
user = mailuser
quota_warn_threshold = 80%