提問者
IIS SMTP relay cannot send e-mail to our own domain.

問題
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Hi,
we installed SMTP Relay with IIS for Microsoft 365. When I try to send e-mail from the printer or some devices the test mail does not deliver to the target domain even our own domain. But for some domains, it works.I couldn't find the reason of this issue. Hope someone can help me.
thanks in advance
所有回覆
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Hi, normal SMTP relay for domain will often trigger spam/junk policies. Did you try to check SMTP logs on IIS if e-mails gets submitted or Exchange message trace if message does not get junked? How you setup Receive Connectors or SPF records for domains?
What about to try follow How to set up a multifunction device or application to send email using Microsoft 365 or Office 365 | Microsoft Docs?
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If the email does not get junked, then you may need to check the SMTP log file. This will tell you if you are having problems sending to specific domains. In most cases, DNS is the culprit.
- 已編輯 HankFWilson 2021年8月12日 上午 01:34
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Hi,
could you do this and share with us the smtp log?
1) enble SMTP logs:
to do it , => Open Start > Programs > Administrative Tools > Internet Information Service (IIS) Manager. Right click "Default SMTP Virtual Server" and choose "Properties". Check "Enable logging".
2) Restart SMTP service or do IISRESET
3) create a notepad file and fill with :
FROM: <source email address> <=== fill with your mail source
TO: <destination email address> <=== fill with your dest email
SUBJECT: Test
This is a test email
3) put the file into as email.txt into this directory :
C:\InetPub\MailRoot\Pickup.
4) wait a while...
5) restart again the SMTP service or IISRESET
6) share the SMTP log. (C:\WINDOWS\system32\LogFiles\SMTPSVC1)
thanks.
- 已編輯 Marco Schiavon 2021年8月23日 下午 01:56
- 已提議為解答 Masstamilan 2021年9月3日 上午 10:15
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I know your are facing problem related to IMAP Server configuration. I hope you enter the right SMTP details. Other than wrong IMAP Configuration there are some factors like antivirus or firewall blocking some sites for unauthorized access. Sometimes, corrupt PST file also caused this issue. You can fix this issue by resolving Outgoing Server glitches. You can also fix inappropriate IMAP Server port issue to solve your Outlook cannot connect to IMAP Server problem. I hope this may resolve your issue and allow you to send emails.
- 已提議為解答 mojaejalooti 2021年9月7日 下午 04:53