fix #4400 and minor clean-up in email req plugin
fix #4400 and minor clean-up in email req plugin

vialectrum/vialectrum,vialectrum/vialectrum,neocogent/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,wakiyamap/electrum-mona,vialectrum/vialectrum,cryptapus/electrum,spesmilo/electrum,spesmilo/electrum,asfin/electrum,fujicoin/electrum-fjc,fujicoin/electrum-fjc,neocogent/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,neocogent/electrum,wakiyamap/electrum-mona,spesmilo/electrum,asfin/electrum,fujicoin/electrum-fjc,cryptapus/electrum,asfin/electrum,cryptapus/electrum,pooler/electrum-ltc,spesmilo/electrum,pooler/electrum-ltc