Email doesn't work - warning: unable to look up public/pickup: No such file or directory

[scossin]

I followed your installation instructions with REDCap version 6.15.14

On the user interface, REDCap doesn't mention any error when sending an e-mail but it never reaches destination. Without receiving emails, it was impossible to set a password for the first user.

In the /var/log/mail.log I had the following error :

postfix/postdrop[]: warning: unable to look up public/pickup: No such file or directory

Googling it, I found this solution :

mkfifo /var/spool/postfix/public/pickup
service postfix restart

It worked.