Multiple blank emails being sent to contacts

When I send emails out, very often the account will send 5 or 6 blank emails to the recipient alongside the actual email I am sending… This is becoming increasingly more frequent and is not reflecting particularly positively on my business, so I would appreciate some help if possible? Thanks!

Hi Carly,

I can imagine how annoying this cold be for both, sender and recipient.
Can you check if same behavior is reproduced when you send mails via webmail?
Please send affected message in .eml file as attachment to cooper@emclient.com

Hi Anthony - the fact that it has taken 4 weeks to get a reply on this really gives me zero confidence in this product, and I have since switched back to Outlook (rather than going for your premium service, which was my other option), which is working perfectly. Thanks anyway.