I moved my hosting to SiteGround and immediately started having problems receiving crucial voicemail notification emails from our VOIP provider. The sender has correct PTR records and the emails come through perfectly fine when sent to any other provider, including our previous host. SiteGround's servers consistently block these emails.Their technical support repeatedly told me they cannot whitelist IP addresses or domains. Our previous host had no issue doing this. Every response from SiteGround felt like going around in circles. They kept asking for bounce-back headers, despite me explaining several times that I am the recipient, not the sender, so I do not receive any bounce-backs.The end result was that they confirmed they are unable to whitelist and told me their email service is only a complimentary add-on. This was never made clear when signing up. They refused to offer a refund even though the service is not fit for purpose. They pointed to their 30-day refund policy, even though the issue only became clear after we were fully switched over and already missing important voicemails from customers.I am now forced to move hosting again just to be able to reliably receive my business emails. The customer service has been incredibly poor with no flexibility, no real help, and no concern for the impact on my business.If you need reliable email for your business, avoid SiteGround.