Set sendmail configurations only when they are present
Set sendmail configurations only when they are present

tany/ss,t-wata-cldt/shirasagi,kaosf/shirasagi,itowtips/shirasagi,tecyama/opendata,toyodundy/shirasagi,shirasagi/opendata,shirasagi/opendata,gouf/shirasagi,ShinjiTanimoto/shirasagi,t-wata-cldt/shirasagi,sert-uw/shirasagi,toyodundy/shirasagi,MasakiInaya/shirasagi,tany/om,kaosf/shirasagi,sunny4381/opendata,MasakiInaya/shirasagi,sunny4381/shirasagi,itowtips/shirasagi,tecoda/opendata,tachikomapocket/shirasagi-_-shirasagi,toyodundy/shirasagi,koba5884/shirasagi,sunny4381/ss-handson,tany/ss,ShinjiTanimoto/shirasagi,shirasagi/ss-handson,sert-uw/shirasagi,shirasagi/shirasagi,tachikomapocket/shirasagi-_-shirasagi,mizoki/shirasagi,tecoda/opendata,tany/om,masakiooba/shirasagi-1,t-wata-cldt/shirasagi,tecoda/opendata,gouf/shirasagi,shirasagi/shirasagi,hotmix/shirasagi,koba5884/shirasagi,itowtips/ss-handson,itowtips/ss-handson,koba5884/shirasagi,gouf/shirasagi,tany/ss,gouf/shirasagi,kaosf/shirasagi,shirasagi/ss-handson,tecyama/opendata,itowtips/shirasagi,sert-uw/shirasagi,mizoki/shirasagi,tecyama/opendata,tany/ss,sunny4381/ss-handson,koba5884/shirasagi,itowtips/ss-handson,ShinjiTanimoto/shirasagi,shirasagi/opendata,toyodundy/shirasagi,itowtips/shirasagi,mizoki/shirasagi,tachikomapocket/shirasagi-_-shirasagi,shirasagi/ss-handson,togusafish/shirasagi-_-shirasagi,masakiooba/shirasagi-1,sunny4381/shirasagi,bee01/shirasagi,tecoda/opendata,tecyama/opendata,ShinjiTanimoto/shirasagi,kaosf/shirasagi,shirasagi/shirasagi,tany/om,sunny4381/ss-handson,togusafish/shirasagi-_-shirasagi,hotmix/shirasagi,shirasagi/ss-handson,sunny4381/shirasagi,tany/om,bee01/shirasagi,sert-uw/shirasagi,sunny4381/opendata,tachikomapocket/shirasagi-_-shirasagi,hotmix/shirasagi,MasakiInaya/shirasagi,bee01/shirasagi,itowtips/ss-handson,sunny4381/shirasagi,shirasagi/opendata,togusafish/shirasagi-_-shirasagi,MasakiInaya/shirasagi,shirasagi/shirasagi,sunny4381/opendata,t-wata-cldt/shirasagi,masakiooba/shirasagi-1,mizoki/shirasagi,masakiooba/shirasagi-1,hotmix/shirasagi,bee01/shirasagi,sunny4381/opendata,sunny4381/ss-handson,togusafish/shirasagi-_-shirasagi