DNS and Exchange IMAP

[southbeach]

Our website was hosted by a 3rd party. Just last week, I brought the site in house and all is well except for one thing, mobile email accounts set as IMAP cannot send/receive email.

Everything else is fine. OWA, POP3, Exchange are all working OK. I have two MX records set for my site (I use GoDaddy.com), priority 0 and priority 10.

I also have the A records and CNAME records.

What am I missing? What am I supposed to have set in order for IMAP to work?

The Exchange server is a local server behind our SonicWall firewall.

Thank you all in advance!

 

[elgrandeperro]

Have you looked at OMA (ouitlook mobile access)? Essentially, this is like a web proxy to the exchange server. You will need to open some port forwards on the sonic for this.

For raw smtp/imap, I believe the device needs to support TLS to prevent clear test passwords,
and you will need to open some port forwarding on the Sonic.
The SMTP service cannot be the same as your generic inbound port 25 service because it is authenticated (or maybe it can?)

Anyway, I believe you should repost this to the Exchange email group because this isn't (i think) a dns/bind/dhcp or wins issue.

 

[southbeach]

elgrandeperro (TheBigDog!),

I thought it was DNS since the only thing that has changed is the DNS settings. Our original hosting provider (a small company in South FL) won't relinquish any info on what he had set and since we have been doing our own email for over a year now, I figure that it had to be DNS related.

I will copy/paste my post in the Exchange forum as well ... Hope I won't be looked at as one that double posts.

Thanks!

 

[elgrandeperro]

So I was at a company that did use OMA. I believe we advertised a different name, like mobilemail.mydomain.com which port mapped 443 to the exchange server through ISA.

We have users here who use IMAP/SMTP over TLS (not to exchange), but I believe if you did that you lose the calendar functionality of Exchnage, I recall because some of the calendar functions are embedded in email.

If you are taling blackberry service, I believe the situation is different.