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Currently we are implementing to use POP3 / IMAP service for flexibility of mail clients.
We are also overlooking on mobiles to be able to access via internet.
We have successfully configured the POP3 / IMAP service and tested already.
Now, the main issue when connecting to the SMTP server. I am planning to
publicly publish an open STMP relay but with user authentication.
Mail Client (e.g. IMAP) --> Internet --> Firewall ---> Email Server (Relay Host to) --> Microsoft Exchange Online Protection --> External Domain
Right now I was able to test the SMTP service using telnet domain.com 25 it was successfully and having reply from ehlo / helo command.
But via on the internet the command or connection reply only with *************** or unrecognized command.
We have already disable SMPT checking or fixup on firewall equipment still no good.
I am thinking to use the Microsoft Exchange Online Protection as alternative relay agent.
But how do I configure the Microsoft EOP and mail client on this? Or can you recommend alternative solution.
Thank you.
Traveler should be included with your Lotus Domino license.
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Closed 1 year ago.
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I created a mail server using postfix and dovecot on ubuntu 20.04. I'm using a valid trusted SSL certificate from let's encrypt, but my mail goes to spam on Gmail and other mail services. I'm sending the email's with port 587 so what's my problem?
I recently configured my server using following manual:
https://ubuntu.tutorials24x7.com/blog/install-mail-server-on-ubuntu-20-04-lts-using-postfix-dovecot-and-roundcube
There are few possible areas which can cause your emails in Junk folder (spam folder).
SPF, DKIM settings in your domain (DNS settings). If not configured properly, mail servers can suspect spoofing and warn their users.
You can send email to your Gmail mailbox and review "Show Original" to review SPF, DKIM, DMARC.
Additionally you can use:
https://www.mail-tester.com/ - to get audit of problems: just simply send to a generated email address email from your server.
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In the features of windows 7 we have both telnet client and telnet server. But in windows 10 telnet server is not available, Can anyone please guide on how to install it? And I am also aware that we can use ssh instead of telnet.
Microsoft deprecated Telnet Servers in Windows Server 2012 R2, and subsequently in Windows 10.
Telnet is considered completely insecure these days, because it sends everything across the wire in plain text, so they removed it.
Since you'd need to install a 3rd party Telnet server, you should (instead) consider installing a SSH server. Similar abilities and results, but SSH is generally considered secure.
Perhaps check out this Serverfault question for some suggested SSH servers:
What is a good SSH server to use on Windows?
(Answer from #Ƭᴇcʜιᴇ007 found HERE)
I know I am a tad late to this feed, but I have used the GSW Telnet Server and SSH Server and they have been great. They claim to be the most secure SSH on the market and I have never had any issues with data security at all.
They do have 24/7 support and can help with installation if there are any difficulties.
Hope this helps - Ben
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I am using Hmailserver as a mail server, and it is working normally for mail clients using a standard internet connection (wired or wireless).
But when using a mobile device in 3G mode, suddenly it is not possible to send emails anymore. In the mail client there is a non saying error message (such as unknown error ocurred). Is there any reason for this?
It is quite hard to say; however, e-mail usually travels over port 25 when using SMTP. Likely your 3G provider is blocking outgoing port 25 connections.
You can verify this by using telnet (a Google for "Windows telnet" will provide some Microsoft documentation) to connect to a well-known mail server (these are advertised in DNS MX records). On Windows, I believe the syntax at the command line would be: "telnet <host> 25" (for Google a valid mail-host is alt2.aspmx.l.google.com).
If your provider is blocking port 25 traffic, you will see a connection denied message. Usually ISP's prefer you connect to their SMTP server -- so that they can prevent SPAM from emanating from their network.
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I have configured ejabberd server on localhost. I am able to connect to local host like admin#localhost, but i am not able to connect gtalk server. Some one please help me how to connect to gtalk server.
Thanks in advance,
sathi
In order for you to talk to GoogleTalk, they have to be able to talk back to you using Dialback. There are several steps you'll need to do:
Rename your server to a fully-qualified domain name. (e.g. example.com)
Open a hole in your firewall in both directions to your server on port 5269/tcp.
Add an SRV record to your DNS pointing at that firewall hole. If your domain was example.com, your SRV might have _xmpp-server._tcp.example.com pointing to 10 0 5269 myserver.example.com.
At some point in the future, you may also need an X.509 certificate for doing TLS.
I almost lost hope, but this thread was really helpful:
Short summary - disable google apps for domain, it can be the reason of getting 404 errors in ejabberd log.
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Closed 13 years ago.
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I would like to send emails from a cmd batch file on windowsOne of my chalanges is that I don't have an smpt server, I'm using an microsoftexchange server in an internal network (no internet connection).
Plz help,
Thanks.
PS:
I do not want to use BLAT becuase it requires an SMPT server which I do not possess on my internal network.
MS Exchange Server is an standard e-mail server and uses SMTP protocol anyway connected to the Internet or only on a local network.
Try BLAT
Update
If you don't have file access to your server and you don´t want to use SMTP you need another protocol to communicate with the server (ftp, http, ssh), don't you ?
You could get the exchange server configured for SMTP relay from the internal interface, but that doesn't solve the whole story. To send from the command line you'd need a third party application like Blat or similar.
I built an app to do this once, but I can't find the source right now (it's on an old machine).
However, it was based on the sample code found here on Code Project...
http://www.codeproject.com/KB/IP/cmapi.aspx
If you have access to your Exchange server you can just dump an *.eml file into the pickup directory. I mean your CMD file can create an EML file and then copy it to the pickup directory on the Exchange server.