Maarten Oelering, Partner/CTO, Postmastery, presents practical solutions to real-life scenarios.

1. PowerMTA Integration
Experiences and Solutions

2. Postmastery and PowerMTA

3. PowerMTA as building block
SMTP SMTP
configuration
accounting

4. Integration challenges

5. Email submission
● SMTP
○ Clients: JavaMail, PHPMailer, MailKit
● Submission API
○ Library: Perl, Java, C++
● Pickup folder
○ Local application
● Transmission API (interim)
○ HTTP, JSON
○ Prebuilt message

6. Mailmerge support
From: "Customer Service" [*from]
To: "[FName]" [*to]
Date: [*date]
Subject: Travel Plans
Dear [FName],
You are flying out of [Airport] given that it is
closest to your location
in [City], [State].

7. Email generator flow
merging encoding submission
RFC5322text+html

8. github.com/postmastery/pmtaemailapi
{
"from": {"name": "Jérôme", "address": "jerome@postmastery.net"},
"to": {"name": "Maarten", "address": "maarten@postmastery.net"},
"subject": "Pay for lunch",
"text": "Hi Maarten, can you pay me €50 for lunch.",
"html": "..."
}
x-sender: jerome@postmastery.net
x-receiver: maarten@postmastery.net
Date: Wed, 11 Sep 2019 12:51:40 +0200
From: =?utf-8?q?J=C3=A9r=C3=B4me?= <jerome@postmastery.net>
To: "Maarten" <maarten@postmastery.net>
Subject: Pay for lunch
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="e0508c573add4451552906243fc9673f43978e67fc3d8b0d44c7bdb693ff"
--e0508c573add4451552906243fc9673f43978e67fc3d8b0d44c7bdb693ff
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset=utf-8
Hi Maarten, can you pay me =E2=82=AC50 for lunch.
--e0508c573add4451552906243fc9673f43978e67fc3d8b0d44c7bdb693ff
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=utf-8
...
--e0508c573add4451552906243fc9673f43978e67fc3d8b0d44c7bdb693ff--
JSON over HTTP

9. Inbound email processing
● Bounce processor
● Feedback loop processor
● Delivery to file
● Pipe to process

10. List-Unsubscribe with mailto
relay-domain unsubscribe.example.com
<domain unsubscribe.example.com>
type pipe
command "/opt/pmta/unsubmail -from=$from -to=$to -pat=(d+)_(d+)_(d+)_([a-f0-9]+)
-url=https://www.example.com/unsubscribe?q=$$1&c=$$3&b=$$2&hash=$$4"
</domain>
List-Unsubscribe: <mailto:229_3430_2346761_618e1a4097f3cf26a8b23f89b9848e5@unsubscribe.example.com>,
<https://www.example.com/unsubscribe?q=229&c=2346761&b=3430&hash=618e1a4097f3cf26a8b23f89b9848e5>

11. Processing accounting data
● Log “tailing”
○ Logstash, Beats, Fluentd, NXLog
○ Integrations: Splunk, Elastic, Kafka
● Pickup folder
○ <acct-file>.move-to, <acct-file>.move-interval
○ Integrations: Interspire
● Pipe to process
○ <acct-file |/path/to/executable>
○ Integrations: Ongage, Mailwizz, Redis

12. Accounting pipes
delivery
OS pipe
accounting
bounded buffersynchronisation

13. Accounting webhook
<acct-file |/opt/pmta/pmtawebhook -url=...>
records b, rb
record-fields b timeLogged,rcpt,dsnAction,dsnStatus,dsnDiag,bounceCat
record-fields rb timeLogged,rcpt,dsnAction,dsnStatus,dsnDiag,bounceCat
</acct-file>
[{"type":"b", "timeLogged":"1382377561", "rcpt": "nobody@outlook.com", "dsnAction":"failed",
"dsnStatus":"5.0.0 (undefined status)", "dsnDiag":"smtp;550 Requested action not taken: mailbox
unavailable", "bounceCat":"bad-mailbox"},...]
JSON over HTTPS

14. PowerMTA 5.X?
Email API SMTP
Configuration API
Event webhooks

15. 15
Dank Je
Thank You