Our cluster upgraded to Rocky Linux which has

sendmail

but not

mail

, causing nextflow pipelines to fail at the final step (making it hard to distinguish real failures from false positives):

java.io.IOException: Cannot run program "mail": error=2, No such file or directory

The docs seem to imply that Nextflow will try

sendmail

and/or

mail

but it seems to give up when

mail

isn't found:

If no mail server configuration is provided, Nextflow tries to send the email by using the external mail command eventually provided by the underlying system (e.g.

sendmail

or

mail

).

Is there any way to specify in the mail scope to use

sendmail

? Will also try to get the cluster to install mail.