текст ошибки следующий и собственно вот в чем это ошибка именно самого битрикса или нужно смотреть в настройки php на сервере
[Error]
Call to undefined function mail() (0)
/var/www/u0130037/standardclinics.com/bitrix/modules/main/tools.php:4521
#0: bxmail(string, string, string, string, string, object)
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/mail/mail.php:191
#1: Bitrix\Main\Mail\Mail::send(array)
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/mail/event.php:270
#2: Bitrix\Main\Mail\Event::handleEvent(array)
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/mail/eventmanager.php:116
#3: Bitrix\Main\Mail\EventManager::executeEvents()
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/mail/eventmanager.php:36
#4: Bitrix\Main\Mail\EventManager::checkEvents()
#5: call_user_func_array(array, array)
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/application.php:830
#6: Bitrix\Main\Application->runBackgroundJobs()
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/application.php:377
#7: Bitrix\Main\Application->terminate(integer)
/var/www/u0130037/standardclinics.com/bitrix/modules/main/lib/application.php:329
#8: Bitrix\Main\Application->end()
/var/www/u0130037/standardclinics.com/bitrix/modules/main/classes/general/main.php:3715
#9: CAllMain::FinalActions()
/var/www/u0130037/standardclinics.com/bitrix/gadgets/bitrix/rssreader/getdata.php:45
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