resolve IP's?

I have hosted a website that i have redesigned and moved from another host. the client said this in an email.(domains and ip address replaced)


"In addition to [thisdomain].com there needs to be to records setup for mail.[thisdomain].com and london.[thisdomain].com

mail.[thisdomain].com needs to resolve xx.xx.xx.xxx
london.[thisdomain].com needs to resolve xx.xx.xx.xxx"

Anyone have an idea of what I should do, ideally before calling back the client and telling him i have no idea what he means? :)
 
that would be DNS A records, it sounds like he has mail and some server named london.hisdomain.com and wants to use external mail and that subdomain.

You can do this with custom DNS without any issue, just disbale the mail service, setup the mail.hisdomain.com and be sure to set an MX record for it, then make an A record for london pointing to the IP he gave.
 
thanks for your reply, that makes some more sense to me. could you clarify 2 things?

A record
MX record

thanks again :)
 
These are the types of DNS records, A record points a name to an IP, MX record is the Mail eXchanger record.
 
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