how can i prevent sending emails using telnet from outside
Hello ,i am looking for a solution since 1 month , we have exchange 2010 server with local antispam ( integrated with firewall ) anyone can do telnet ( exchange public ip ) port 25 and can send emails...
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Replacing Certificates
We are currently using a wildcard certificate: *.ourdomain.comWe are going to change from a wildcard and start using: mail.ourdomain.comI did the following:1. Added the intermediate certs on each CAS...
View ArticleSet up new Exchange 2013 environment, able to send mails internally but not...
Hello everyone,First off, I would like to state that I have around five years of Microsoft Server experience, but I have never set up an Exchange environment from scratch, and my knowledge in that area...
View Articleintermittent mail flow issue
Hi,I have an Exchange Server 2013 running on one Server. I have set up a receive connector for the internal Scanner (Scan to Email). this works most of the time - but occasionally fails with the...
View ArticleSending HTML email from outlook 2013 exchange it comes broken to non outlook...
Hi, when i send out email from my outlook 2013 where is configured Microsoft exchange account it comes broken to gmail clients. All html mail is broken and attachments comes like this file.jpg_ or...
View Articleintermittent mail flow issue
Hi,I have an Exchange Server 2013 running on one Server. I have set up a receive connector for the internal Scanner (Scan to Email). this works most of the time - but occasionally fails with the...
View ArticleExchange Server 2013: Not Receiving Internet email
Hello Guys, I have a new Exchange 2013 install and i am having problems receiving internet email. When testing from https://www.testexchangeconnectivity.com it fails at the last step when it tries to...
View ArticleSpam to external enabled distribution groups
Good morningWe are having a problem in that we are receiving a lot of spam to externally available distribution groups (ones that accept email from the internet as well as from within my...
View ArticleExchange Server 2013, External emails are not coming through. I can send out.
Hello,I am creating Exchange 2013 Lab with 1 Domain Controller (2 NIC, 1 with dynamic IP, second with static IP address), Exchange Server 2013 (Also 2 NIC, 1 dynamic 1 static IP), and Windows 8 (2 NIC...
View ArticleWe are being targeted by Microsoft...
As a valid user of several Microsoft services, such as Azure, MSDN, Volume Licensing, etc. I expect to have some degree of clout with MS. However this is not the case.Today we were blacklisted by...
View ArticleCertificate issue
Hi, I got the new SSL certificate from SSL providers and added the SSL certificate to my exchange server. I mapped my domain with godaddy. It is working fine in internal network. But its not...
View ArticleExchange 2007 RU4 -DDL- Source: Agent EVENTID FAIL - need some help
I am having a new issue on my mailserver where most of my DDL's are not being delivered.I can review the properties of the DDLs and they show the necessary recipientes in the filter.When I send to...
View ArticleDisable SMTP sendng mail without Auth
I have a potential security issue where existing users (may not be himself) when they telnet to SMTP (user1@domain.com) can email to any users in the domain (*@domain.com) this can lead to someone...
View ArticleOWA Error-"The message cannot be sent"
Hello,I installed Microsoft Exchange 2010 on Windows Server 2008.The installation was successfully completed. The URL for the OWA is also working.But there is a problem in sending and receiving...
View ArticleHow to configure an IP Block List Provider like zen.spamhaus.org in Exchange...
Is this a correct script to configure BlockList Providers in Exchange 2013 RTM?& $env:ExchangeInstallPath\Scripts\Install-AntiSpamAgents.ps1Restart-Service...
View ArticleMails from Exchange 2013 to Exchange Online blocked using Blocklist 1
Hello,1 week ago I've implemented a new Exchange 2013 at a company which used SBS 2011 before.But now its impossible to send a mail to a recipient on Exchange Online.Everytime we get a NDR with the...
View ArticleMessages blocked by Outlook.com
I have a new client that had a server that was being abused via backscatter spam and now they've been blocked from outlook.com email (ie live, hotmail, msn, etc). I've resolved the issue but don't see...
View ArticleUser receives meeting confirmation during Database Maintenance Window
Hello I am facing an unusual behaviour which drives me crazy.A user (it’s unfortunately an important one) receives every night at 02:07 meeting confirmations in his “deleted items” folder. During this...
View ArticleTNEF Issue - Winmail.dat or messages stuck in submission queue
Hi guys, I've looked around the forums and have found people that have had submission queue issues when they set TNEF to $null or $false, and have found that the unified answer is to set TNEF to...
View ArticleExchange 2013 not delivering mails to Exchange 2010
I am upgrading exchange 2010 to exchange 2013 and currently in coexistence. I cutover the mx to deliver mail to 2013 cas VIP last night and no mail was being received by the 2010 mailboxes, it was all...
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