[fix] log newsletter sending error
[fix] log newsletter sending error

sagar30051991/ozsmart-erp,sagar30051991/ozsmart-erp,indictranstech/erpnext,mbauskar/helpdesk-erpnext,indictranstech/erpnext,gsnbng/erpnext,ShashaQin/erpnext,ShashaQin/erpnext,sagar30051991/ozsmart-erp,indictranstech/osmosis-erpnext,mahabuber/erpnext,gangadharkadam/v6_erp,geekroot/erpnext,indictranstech/erpnext,mbauskar/helpdesk-erpnext,Aptitudetech/ERPNext,sagar30051991/ozsmart-erp,mbauskar/helpdesk-erpnext,gsnbng/erpnext,aruizramon/alec_erpnext,gsnbng/erpnext,njmube/erpnext,gsnbng/erpnext,njmube/erpnext,gangadharkadam/v6_erp,aruizramon/alec_erpnext,aruizramon/alec_erpnext,aruizramon/alec_erpnext,ShashaQin/erpnext,mahabuber/erpnext,mahabuber/erpnext,geekroot/erpnext,anandpdoshi/erpnext,njmube/erpnext,gangadharkadam/v6_erp,indictranstech/erpnext,indictranstech/osmosis-erpnext,geekroot/erpnext,anandpdoshi/erpnext,indictranstech/osmosis-erpnext,gangadharkadam/v6_erp,ShashaQin/erpnext,indictranstech/osmosis-erpnext,anandpdoshi/erpnext,mahabuber/erpnext,mbauskar/helpdesk-erpnext,anandpdoshi/erpnext,geekroot/erpnext,njmube/erpnext