which module is checking mail every minute ?

[Zhang Jun]

I notice emacs is checking mailbox every minute,
but I'm not using gnus/mew/rmail ...

strace log:

19154 stat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 readlink("/var/mail/root", 0x862acc0, 100) = -1 EINVAL (Invalid
argument)
19154 lstat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 stat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 readlink("/var/mail/root", 0x85c0668, 100) = -1 EINVAL (Invalid
argument)
19154 lstat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 stat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 readlink("/var/mail/root", 0x862acc0, 100) = -1 EINVAL (Invalid
argument)
19154 lstat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 stat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 readlink("/var/mail/root", 0x85c0668, 100) = -1 EINVAL (Invalid
argument)
19154 lstat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 stat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
19154 readlink("/var/mail/root", 0x862acc0, 100) = -1 EINVAL (Invalid
argument)
19154 lstat64("/var/mail/root", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0

# emacs -version
GNU Emacs 23.4.1