Can't reset password or register on the site FATAL ERROR

Hey guys, my website was working fine, I didn't do any changes to it. And today I tried to login and reset my passowrd and it didn't work. I also can't register.
I get following error. What can it be?

Warning: fsockopen() expects parameter 5 to be double, string given in /home/sites/site46644/web/system/library/mail/smtp.php on line 87
Fatal error: Uncaught exception 'Exception' with message 'Error: ()' in /home/sites/site46644/web/system/library/mail/smtp.php:90 Stack trace: #0 /home/sites/site46644/web/system/library/mail.php(142): Mail\Smtp->send() #1 /home/sites/site46644/web/admin/controller/mail/forgotten.php(24): Mail->send() #2 [internal function]: ControllerMailForgotten->index('user/user/editC...', Array, NULL) #3 /home/sites/site46644/web/storage/modification/system/engine/action.php(79): call_user_func_array(Array, Array) #4 /home/sites/site46644/web/system/engine/event.php(62): Action->execute(Object(Registry), Array) #5 /home/sites/site46644/web/storage/modification/system/engine/loader.php(255): Event->trigger('model/user/user...', Array) #6 [internal function]: Loader->{closure}(Array, Array) #7 /home/sites/site46644/web/system/engine/proxy.php(47): call_user_func_array(Object(Closure), Array) #8 /home/sites/site46644/web/admin/controller/common/forgotten.php(21): Proxy->__call('editCode', Array) #9 /home/sites/site46644/web/admin/contr in /home/sites/site46644/web/system/library/mail/smtp.php on line 90

and when trying to register:

Warning: fsockopen() expects parameter 5 to be double, string given in /home/sites/site46644/web/system/library/mail/smtp.php on line 87
Fatal error: Uncaught exception 'Exception' with message 'Error: ()' in /home/sites/site46644/web/system/library/mail/smtp.php:90 Stack trace: #0 /home/sites/site46644/web/system/library/mail.php(142): Mail\Smtp->send() #1 /home/sites/site46644/web/catalog/controller/mail/register.php(44): Mail->send() #2 [internal function]: ControllerMailRegister->index('account/custome...', Array, '87') #3 /home/sites/site46644/web/storage/modification/system/engine/action.php(79): call_user_func_array(Array, Array) #4 /home/sites/site46644/web/system/engine/event.php(62): Action->execute(Object(Registry), Array) #5 /home/sites/site46644/web/storage/modification/system/engine/loader.php(255): Event->trigger('model/account/c...', Array) #6 [internal function]: Loader->{closure}(Array, Array) #7 /home/sites/site46644/web/system/engine/proxy.php(47): call_user_func_array(Object(Closure), Array) #8 /home/sites/site46644/web/catalog/controller/account/register.php(22): Proxy->__call('addCustomer', Array) #9 /home/sites/site46644/web/catalo in /home/sites/site46644/web/system/library/mail/smtp.php on line 90

Will be grateful for any ideas. Thanks!

This email error message originates from your OC admin email configurations: Admin - > systems - > settings - > edit settings - > mail tab. Ensure your email configuration are properly configured.