We appreciate the feedback, especially when it is fair. However, in this case we don't believe it is, especially where that service isn't provided by us.
The customer reported issues with a service indirectly provided and the claims of missing messages could never be proven. In a choice of one of three third party webmail clients, the missing messages could be seen and viewed.
Further more, the customer reported that two emails were missing attachments when in fact these messages were using inline encoded content to make up a HTML formatted message. When rendered, the attachments do not show because they form part of the message.
There is certainly no issue that we are unable, or won't resolve but can only do so where there is evidence that such problem exists and this was not the case.
Notably we do not provide an email forwarding system and have never done so in the past.