Hi list,after studying the documentation about SRS (https://www.exim.org/exim-html-current/doc/html/spec_html/ch-dkim_spf_srs_and_dmarc.html#SECTSRS) I have a problem understanding one detail:
Why is it required to set max_rcpt=1 in the remote_forwarded_smtp transport?The documentation seems not to include any reasons, why you have to do this for SRS forwards (explicitly).
I even found an example where this might be disturbing: Imagine a mail alias based list with n recipients at the same external destination domain (e.g. some freemailer). If some x recipients of them have e.g. quota issues, the original sender will get x bounce messages. With max_rcpt=100 (the default), the sender will get only one bounce with a list of x failed recipients. This example is independent of SRS, however if SRS is in use, the local MTA also has to deal with x bounces to be forwarded back to the original sender.
Regards, -- Patrick Cernko <pcer...@mpi-klsb.mpg.de> +49 681 9325 5815 Joint Scientific IT and Technical Service Max-Planck-Institute für Informatik & Softwaresysteme
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