I hope this isn't just some user error on my part, but whenever I use the --suppress-cc option, and I specify more than one keyword (e.g. --suppress-cc=author,self ), git complains that it doesn't recognize the keyword. It seems that it treats all of the comma-separated keywords as one big keyword with commas in it. Here's the git-bugreport: Thank you for filling out a Git bug report! Please answer the following questions to help us understand your issue. What did you do before the bug happened? (Steps to reproduce your issue) git send-email --suppress-cc=author,self ... What did you expect to happen? (Expected behavior) The command to succeed, excluding "author" and "self" from the automatic CC. What happened instead? (Actual behavior) Unknown --suppress-cc field: 'author,self' What's different between what you expected and what actually happened? The --suppress-cc command should accept multiple keywords. Anything else you want to add: I was able to work around the problem by specifying --suppress-cc multiple times, once for each keyword. [System Info] git version 2.50.1 cpu: x86_64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh libcurl: 8.5.0 zlib: 1.3 SHA-1: SHA1_DC SHA-256: SHA256_BLK uname: Linux 6.14.0-27-generic #27~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 2> compiler info: gnuc: 13.3 libc info: glibc: 2.39 $SHELL (typically, interactive shell): /bin/bash [Enabled Hooks]