Q0604
Question
I want to use MMDF-style mailboxes. How can I get Exim to append the ctrl-A characters that separate indvidual emails?
Answer
Set the message_suffix option in the appendfile transport. In fact, for MMDF mailboxes you need a prefix as well as a suffix to get it working right, so your transport should contain these settings:
message_prefix = "\1\1\1\1\n" message_suffix = "\1\1\1\1\n"
Also, you need to change the check_string and escape_string settings so that the escaping happens for lines in the message that happen to begin with the MMDF prefix or suffix string, rather than “From” (the default):
check_string = "\1\1\1\1\n" escape_string = "\1\1\1\1 \n"
Adding a space to the line is sufficient to prevent it being taken as a separator.