Hello,

tail -f /var/log/exim_mainlog | grep email@domain.com

If you faced the error "Transport filter process failed (127)" with receiving emails.
Please try.

OR

virtual_sa_userdelivery transport output: An error was detected while processing a file of BSMTP input.

Solution :

/scripts/fixspamassassinfailedupdate

If still you are facing same problem again then try to reinstall perl module with

perl -MCPAN -e shell
clean Mail::SpamAssassin
install Mail::SpamAssassin

If you find any other solution please update here..


Regards
Tuks