We have several mailboxes that have had more than 1,000 proxy addresses for many years and have had no issues.
Best, James Rupprecht Enterprise IT Architect, Microsoft Technologies The University of Kansas ----- Original Message ----- On Sep 4, 2013, at 6:47 PM, "Sam Cayze" <[email protected]> wrote: I wasn’t sure if the Exchange List made it over to ITForum :) (Or exists at all anymore). And it seemed (at the time), simple enough. Yes, proxy address with multiple ‘smtp:’ values. I’ve seen people on the interwebs mention they have gone up close to 1000 with no issues. Someone else mentioned theirs got corrupted around 600. Someone seemed pretty adamant that there was a hard limit at 1203. I like your idea. Although it makes scripting it a little tougher, but I could split it into batches and just adjust the script each time. (I’ll have to keep adding about 10 a week). Note, this will only last for about 3 months – then we delete them all (Short term special project with a new client). I’m more and more leaning towards Public Folders now, and I think I can get our operations team to agree to it. Here’s my PF import script if anyone is curious… (CVS Field Name: PFName,PFIdentity,Email) Import-CSV CreatePublicFolders.csv | ForEach {New-PublicFolder -Name $_.PFName -Path \Client1\BulkTechAccounts; Enable-MailPublicFolder -Identity $_.PFIdentity -HiddenFromAddressListsEnabled $True; Set-MailPublicFolder -Identity $_.PFIdentity -EmailAddressPolicyEnabled $False -EmailAddresses $_.Email} Thanks for your input everyone, especially you Michael. From: [email protected] [mailto:[email protected]] On Behalf Of Michael B. Smith Sent: Wednesday, September 04, 2013 5:05 PM To: [email protected] Subject: RE: [NTSysADM] Limit to how many SMTP addresses a mailbox can have? Why isn’t this on the Exchange list? ☺ The other Exchange MVPs don’t read this list…. What attribute do you intend to use to store those email addresses? ProxyAddresses? I think the hard limit is around a thousand. If Brian is around, he can probably answer that. I would have to dive into the schema and I don’t want to right now. ☺ I would do this hierarchically. Create a single user/mailbox that is the final destination for all of this email. Pick some manageable number of email addresses (and no, I don’t consider 400 manageable). Then divide 400 by that number X. Create that number of subsidiary mailboxes and configure their Delivery Properties to deliver to the “final destination” mailbox. Assign X SMTP addresses to each mailbox. I would place all the mailboxes in a single OU, and assign the “final destination” mailbox a name that would cause it to sort first in ADUC/ADAC/EAC with a detailed description. From: [email protected] [mailto:[email protected]] On Behalf Of Sam Cayze Sent: Wednesday, September 4, 2013 4:57 PM To: [email protected] Subject: [NTSysADM] Limit to how many SMTP addresses a mailbox can have? I’m tasked with creating a mailbox that will house over 400 smtp email addresses. Think of it as a big catch-all mailbox. I’m not too worried about setting up a script to make them, I was just wondering if there was a hard limit in place. Also, any other caveats to this? Theirs is a good business justification for this. My other thought it to script the creation of 400+ public folders for each address, which I would be totally happy with, but it’s harder to monitor all those for new messages. I guess another option would be to a create about 400 contacts in AD, each forwarding to a mailbox. As long as that too is scriptable, I’m open to it. Exchange 2010 SP1 -Sam
