Email Not Working Consitently

[Sytner]

Hi,
I appear to be having trouble sending email on my free hosting account. I can receive emails fine on my email accounts but whenever I send an email (Roundcube, thunderbird,outlook) the message 'sends' without error but the recipient never receives it. It copies to the sent folder and everything and I have checked that my settings are correct.
Any guidance or assistance in this matter would be greatly appreciated as it is my business email account.

URL: daniel-waghorn.co.uk
Username: dcwx10mx

 

[fish4um6]

My email is working fine that i have attached to this host, just comes a day late.

 

[abowmedi]

I am having the same problems as Sytner. Emails seem to send fine and go into the Sent folder, but nobody receives them, so I'm not sure if x10Hosting can be relied on?