MailGW enable TLS, but mailserver don't support,

H

hoanv9

Well-Known Member
Apr 15, 2020
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Hi all,
I want to enable tls support for incoming email by proxmox, but the problem is our backend email not support tls so the flow failed when transferring email to server.
I dont want to re-configure the email server, is there anyway to set TLS only from Proxmox then use the normal to mailserver?
 
That usually is not a problem - as TLS in SMTP is opportunistic - if your downstream/backend mailserver does not advertise STATTLS PMG should simply transfer the mails without TLS.

If you run into problems - please share the logs - then we might be able to help...
 
BTW, do we need to enable tls? I got the report that some email may miss if the sender require tls and the mailgw dont enable it.
I also tried to enable the TLS, do the telnet internally
openssl s_client -starttls smtp -crlf -connect 127.0.0.1:25
but can not find any certificate
 
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