Why am I getting an error when receiving mail from Outlook.com?

Linode Staff

I have recently started noticing the following issue whenever my smtp server receives mail from outlook.com. Right after delivery finishes, I receive the following error:

2020-06-16 02:39:54 SSL_write: (from mail.outbound.protection.outlook.com (outbound.protection.outlook.com) syscall: Connection reset by peer
2020-06-16 02:39:54 SSL_write error 5

1 Reply

From my research, it seems that some Outlook servers are blacklisted on spam lists by Exim, which results in the handshaking failing and resets the connection. I believe this is what is happening to you here.

I was able to find some steps to take that may resolve this issue:

I recommended adding to /etc/virtual/whitelist_hosts_ip, as well as adding the below to /etc/virtual/whitelist_domains:



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