Mail not being delivered. virtual server mailboxes
Hi i have a problem with my virtual server web mail.
We have about 30 clients that we host websites for and we also give them free hord webmail that we turn on using the plesk panel. i turn it on by navigating to their web hosting (in plesk) and turning on the hord webmail.
My company also has our website and mail on the same virtual server as our clients.
The problem is:
If i send mail from my mailbox: firstname.lastname@example.org
to a client at email@example.com then the email will get lost and vice versa if the client tries to sends to me.
I have been trying to add spf records to the domains but not sure if it is working.
This is what i have set on tseoc.co.uk
v=spf1 ip4:126.96.36.199/24 +a +mx -all
and this is what i have set on ersad.co.uk
v=spf1 +a +mx -all
Other client have problems also with mail but using a different set up.
for example: clients that have mail set up to send to an external mail server like vizsec.com that have their mail getting sent over to fast-hosts mail servers.
Can any one take a look at the DNS for those domains and advise me of any settings that might be incorrect please.