The receiving part with IMAP works just fine however.
I'm using sendmail to send mails outbound. I have a seperate mail server that is on the same lan,
It has an DKIM as well as an SPF record and is open to the internet. Both records are verified working.
OTRS is running the latest version and is running on the latest Debian 9.5.
The linux box also has an FQDN.
As i said it'll receive just fine but sending puts it in the queue and then never ends up sending it.
I have tried resetting my password but never got an mail from otrs. My mail server sends and receives mail just fine.
My mail server is also running on Debian 9.5.0
some communication logs:
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1 Kernel::System::Email Building message for delivery. 09/24/2018 21:26:03 2 Kernel::System::Email Queuing message for delivery. 09/24/2018 21:26:03 3 Kernel::System::MailQueue Serializing and saving message (ArticleID: , Sender: email@example.com, Recipient: root@localhost, MessageID: ) 09/24/2018 21:26:03 4 Kernel::System::MailQueue Successfully stored message for sending. 09/24/2018 21:26:03 5 Kernel::System::Email Successfully queued message for delivery (To: 'root@localhost', From: 'firstname.lastname@example.org', Subject: 'OTRS Scheduler Daemon Cron: FetchMailSSL').
i ran: "telnet localhost 993" as well as "telnet localhost 25" and got the same error.
in my /var/log/mail.log it states the following:
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Sep 24 15:20:12 otrs sm-mta: w8OCj4Tg002125: to=<email@example.com>, delay=06:35:04, xdelay=00:00:00, mailer=esmtp, pri=3810967, relay=mail.domain.nl. [<external ip>], dsn=4.7.1, stat=Deferred: 450 4.7.1 <otrs.domain.nl>: Helo command rejected: Host not found
Any help is appreciated and thank you so much in advance for your time!
If any more info is needed i will gladly try my best to provide it asap!