Exchange Server Forums

What happens to emails if...

Users viewing this topic: none

Logged in as: Guest

Printable Version

All Forums >> [Microsoft Exchange 2003] >> Message Routing >> What happens to emails if...

Page: [1]

Message

<< Older Topic Newer Topic >>

Limited time MSExchange.org offer! -- 1.Sep.2008 1:00:00 PM

TechGenix and SolarWinds have partnered to provide free copies of SolarWinds Exchange Monitor to all visitors who join the MSExchange.org Forums. SolarWinds Exchange Monitor is a handy desktop dashboard that continuously monitors Microsoft Exchange to deliver real-time insight into Exchange services, mail queue sizes, and host server health. Learn more about Exchange Monitor and the free offer!

What happens to emails if... - 25.Jul.2005 6:16:00 PM

mikev80

Posts: 3
Joined: 25.Jul.2005
From: San Francisco
Status: offline

Hi all,

Quick question. I have two Exchange servers in one domain. Since they are geographically separated, both servers are backend servers housing mailboxes for their region. What happens if Server2 goes down? Will mail destined for a mailbox in Server2 be queued in Server1 until it comes back online? Or will senders get NDR's?

TIA

Post #: 1

Featured Links*

RE: What happens to emails if... - 25.Jul.2005 11:54:00 PM

isawader

Posts: 119
Joined: 7.Jul.2005
From: US
Status: offline

Which one is receiving emails for the domain?

(in reply to mikev80)

Post #: 2

RE: What happens to emails if... - 26.Jul.2005 11:49:00 AM

mikev80

Posts: 3
Joined: 25.Jul.2005
From: San Francisco
Status: offline

they both do, both ip addresses are published in dns.

I ran the test late last night and found that the emails will stay in queue for 2 days.

(in reply to mikev80)

Post #: 3

RE: What happens to emails if... - 26.Jul.2005 8:09:00 PM

isawader

Posts: 119
Joined: 7.Jul.2005
From: US
Status: offline

How do they both get emails?

There can be only one MX record active at any given time. You can have hundreds of them in the DNS but with the priority. So I am guessing one server receiving emails and bounce to other.

Is my assumption correct?

[ July 26, 2005, 08:15 PM: Message edited by: isawader ]

(in reply to mikev80)

Post #: 4

RE: What happens to emails if... - 27.Jul.2005 4:33:00 PM

mikev80

Posts: 3
Joined: 25.Jul.2005
From: San Francisco
Status: offline

one server has a higher mx record than the other..but i see messages hitting both system. i'm looking in the queues and see that each server have messages queued up for each other. However, the one published with the lower mx priority is receiving only spam messages.

looks like spam servers are purposely targetting lower priority mail servers for a domain.

(in reply to mikev80)

Post #: 5

RE: What happens to emails if... - 27.Jul.2005 5:52:00 PM

isawader

Posts: 119
Joined: 7.Jul.2005
From: US
Status: offline

Spammers harvest the MX records and target their spams to all email servers.

(in reply to mikev80)

Post #: 6

RE: What happens to emails if... - 28.Jul.2005 7:56:00 PM

MSRyman

Posts: 63
Joined: 31.Oct.2004
From: Dallas Tx
Status: offline

With having 2 MX records pointing to 2 different servers for the same smtp domain assuming at least one of them is alive it will hold mail destined for users on other server both internal and external msgs for a default of 2 days at which time it will NDR. You can change the time it will hold before NDRing ON PROPS OF smp VIRT SVR

(in reply to mikev80)

Post #: 7