Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Asked 6 years, 10 months ago. Active 2 years, 4 months ago. Viewed 2k times. Everything used to work fine until some days ago; then, SMTP relay stopped working only on the Windows Server system, while it kept working fine on all the other systems; the SMTP logs show a very strange behavior: it looks like something gets stuck after an AUTH command is issued, and then the remote server drops the connection due to a timeout: What can be causing such an error, and how can we fix it?
Improve this question. Massimo Massimo Since you've still got a few months until goes out of support, I would definitely call up Microsoft support and make it their problem, while that's still an option. Add a comment. Active Oldest Votes. Improve this answer. Like this: Like Loading Wireless network connectivity solution two different houses.
Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public. Name required. Follow Following. Sam Lee. Sign me up. Already have a WordPress. Log in now. Note the options that are available in the Relay Restrictions dialog box. By default, the Only the list below option is selected and this list is empty.
Additionally, the Allow all computers which successfully authenticate to relay, regardless of the list above option is selected. With this feature, users and computers that can authenticate with the server can relay through the server. All computers are blocked except those that meet the authentication requirements that you configured earlier in the Authentication dialog box of the Access tab. Note that if you allow only anonymous access, the server does not authenticate users or computers.
Click Add, and then do one of the following to add a single computer, group of computers, or a domain:.
Click Single computer. Click Group of computers. Type the subnet address and the Subnet mask of the group into the corresponding boxes, and then click OK. The information in this article helps you to evaluate whether the configuration of your SMTP virtual server has changed in a way that allows it relay messages that are sent by unintended hosts. For additional information about how to configure a remote SMTP mail relay server, click the following article number to view the article in the Microsoft Knowledge Base:.
For a user or computer to relay e-mail messages through an SMTP virtual server, the following two conditions must be met: The user or computer must be able to access the SMTP virtual server.
The SMTP virtual server must be configured to relay e-mail messages to other domains. Under Relay restrictions , click Relay. Click Add, and then do one of the following to add a single computer, group of computers, or a domain: Click Single computer.
Click Domain.
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