Here's a doozy for the real legends...

[MQCarpenter]

I want to handle mail for a second domain that is owned by another company we are working with.

ie We are abc.com, and they are xyz.com, but some of our users need xyz.com email addresses.

I configured our IMS to accept xyz.com as inbound, and I am assuming that xyz.com needs to add an MX record for our mail server to there DNS. Is there more to this, or am I overanalyzing the situation?

Not really a doozy, but it made you look right?? TIA

 

[MQCarpenter]

BTW::

I do NOT want to be added to their mail replication or vice versa; I just want these handful of users to be able to have this functionality (multiple domain email addresses)

 

[Zelandakh]

Does everyone need the second domain?

Are we talking a lot of people?

If not, set the MX record to point to your server like abc.com. Set xyz.com as inbound like abc.com. Set the relevant users with TWO email addresses. joe.bloggs@abc.com and joe.bloggs@xyz.com. If there are a lot of people you could set this as default, if only a handful just add them into SMTP.

Otherwise your option is to either reroute xyz.com to abc.com (you can leave yourself as an open relay though) or get your ISP to reroute.

Do you want the option to send out as both domains?

 

[MQCarpenter]

Well, isn't it xyz.com's DNS that needs the MX record?

We are talking about 6 email addresses, tops.

These users need to use both addresses. They will only use xyz.com when the business relates to that company. (I know, it sounds asinine. That is why I am in IS and they are in their business.)

So I should add them as inbound and add the MX record on their DNS? That is it? won't we get tons of traffic because of this? "We are all ignorant about one subject or another. Most of us just can't keep our mouths shut when that topic comes up."
~Anonymous

 

[Zelandakh]

In that case, get your ISP to set the MX record for xyz.com to the same IP as abc.com. Then set the IMC of the server to accept xyz.com as inbound. Don't bother rerouting.

For those 6 users, go to SMTP address and add in joe.bloggs@xyz.com or whatever. This will work for receiving.

You can set the default reply address but I've never experimented with being able to send out as xyz.com.

I normally do this by having a second mailbox in Exchange, having it pick up the second one in Outlook with relevant permissions (see a reply I posted about setting that up recently). Then they use their abc.com mailbox to reply from that one and the other mailbox to reply AS xyz.com.

Hope this helps.