make it possible NOT to receive batch emails.
I am referring to cases where an outsourcer makes groups out of the LSP's listed in the directory and batch-emails them.You may want to make things easier for outsourcers, but you shouldn't inconvenience translators who don't want to receive batch emails. You can introduce a checkbox for those who don't want to receive these emails. If it's not technically possible, at least you can show the potential batch-emailer a short sentence like 'This user doesn't wish to receive batch emails'. Some may not see it, some may ignore it, but it would still decrease the number of batch emails which is annoying.