[exim-dev] [Bug 2159] New: using -f "" AND multiple .forward…

https://bugs.exim.org/show_bug.cgi?id=2159

            Bug ID: 2159
           Summary: using -f "" AND multiple .forward files causes frozen
                    mail
           Product: Exim
           Version: N/A
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Filters
          Assignee: nigel@???
          Reporter: graeme.exim4@???
                CC: exim-dev@???

I came about this via a very convoluted route , using fetchmail, and maildrop.
In the end it seems to come down to a simple exim4 config.

If I send a mail like this:

sendmail -f postmaster@???  graeme@home olivia@home < msg.eml    

all is good.

If I send it like this:

sendmail -f ""  graeme@home olivia@home < msg.eml    

All is still good.

However if BOTH graeme & olivia have .forward files, of the form:

# Exim filter                                                                   
deliver oliviaxx@??? 

# Exim filter                                                                   
deliver graemexx@???

Then the message gets frozen , BY THE FORWARDED TO server:
Message 1dkH5w-0005KR-V3 has been frozen (delivery error message).
The sender is <>.

The following address(es) have yet to be delivered:
graemexxx@??? <graeme@home>: SMTP error from remote mail server after
RCPT TO:<graemexxx@???>: host relay.force9.net [212.159.9.104]: 550
<graemexxx@???> Invalid number of recipients



So the conditions for this to occur seem to be:

-f "" must be used (-f postmaster@... seems to work)
two (or more?) local address must be given
both must .forward to an external MTA

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