failing fsync() with EINVAL should not cause a TempFail in mboxfile,

it means the file was most likely a device not supporting fsync() so
we can't do much and retrying isn't going to help.

1 files changed, 1 insertions, 1 deletions

diff --git a/usr.sbin/smtpd/mail.mboxfile.c b/usr.sbin/smtpd/mail.mboxfile.c
index 96fa2e02a37..c466e56685d 100644
--- a/usr.sbin/smtpd/mail.mboxfile.c
+++ b/usr.sbin/smtpd/mail.mboxfile.c
@@ -94,7 +94,7 @@ mboxfile_engine(const char *sender, const char *filename)
 
 	if (fflush(fp) == EOF ||
 	    ferror(fp) ||
-	    fsync(fd) == -1 ||
+	    (fsync(fd) == -1 && errno != EINVAL) ||
 	    fclose(fp) == EOF)
 		err(EX_TEMPFAIL, NULL);
 }