Can't login on IE and Safari

Question

Customers can not login to Magento using IE or Safari. I have tested with secure and not secure and it doesn't make a difference. Login works fine on Firefox and Chrome.

Attaching login from Safari

Here are the PHP and Apache items that Vladimir asked for

Server PHP API would be php-fpm or fastcgi. (I'm assuming that's what he meant anyway.)

Here is the list of installed Apache modules:

core_module (static)
mpm_prefork_module (static)
http_module (static)
so_module (static)
cgi_module (shared)
authz_user_module (shared)
authn_file_module (shared)
auth_basic_module (shared)
authz_groupfile_module (shared)
authz_host_module (shared)
include_module (shared)
deflate_module (shared)
log_config_module (shared)
env_module (shared)
mime_magic_module (shared)
expires_module (shared)
headers_module (shared)
unique_id_module (shared)
setenvif_module (shared)
proxy_module (shared)
proxy_connect_module (shared)
proxy_ftp_module (shared)
proxy_http_module (shared)
mime_module (shared)
dav_module (shared)
status_module (shared)
autoindex_module (shared)
info_module (shared)
suexec_module (shared)
vhost_alias_module (shared)
negotiation_module (shared)
dir_module (shared)
actions_module (shared)
userdir_module (shared)
alias_module (shared)
rewrite_module (shared)
fastcgi_module (shared)
ssl_module (shared)
watch_module (shared)
wsgi_module (shared)

Answer 1

We found that live server was unable to execute loginPost action somehow. We changed login page's form action from loginPost to loginpost then it worked fine. (capital P cause issue).

I believe this is a short term answer and I am still unsure why Chrome and Firefox worked fine?

Answer 2

Try these settings in : System > Config > Web

1. Cookie Lifetime: 86400
2. Cookie Path:
3. Cookie Domain:
4. Use HTTP Only: YES
5. Cookie Restriction Mode: no

Important settings is HTTP Only: YES Rest of the settings will be default settings. This should work.

I tried all the other options in SO, but they didnt help me, so if anyone else is on same boat maybe try this.