DKIM support for spring-boot-starter-mail.
https://oceanentrancement.weebly.com/windows-server-2012-datacenter-product-key-generator.html. Avoid your sent email in spam folder. Windows 8.1 pro product key generator 2014 free download.
Generating 2048 bit DKIM key. Please note that you may want to use a 2048 bit DKIM key - in this case, use the following openssl commands: openssl genrsa -out private.key 2048 openssl rsa -in private.key -pubout -out public.key However, 2048 bit public DKIM key is too long to fit into one single TXT record - which can be up to 255 characters. . First, generate the private key: – openssl –genrsa –out file bits. Generates a new RSA private key using the specified number of bits as the key size and writes it out to the specified file – Larger numbers of bits increase security by geometrically increasing the difficulty of cracking the key.
- DKIMSigner to sign MimeMessage
- AOP @Before to interceptor JavaMailSender.send and sign MimeMessage before sending
How to use
- Add following dependency in your pom.xml:
- in application.properties, add following configuration
- User JavamailSender as usual because of AOP
a DKIM key setup:
There are test keys in the src/test/resources/rsa/ directory but be aware to use those only for your tests.
You need:
- a private key on your hard disc (e.g. in keys/); you can generate a new key by
- DKIM for JavaMail needs the private key in DER format, you can transform a PEM key with openssl:
- a public key in your DNS; here is a sample resource record with selector 'default': default._domainkey IN TXT 'v=DKIM1; g=*; k=rsa; p=MIG..the_public_key_here..AQAB' (see http://www.ietf.org/rfc/rfc4871.txt for details)You can use openssl to get a public key from the private key:
![Openssl generate key file Openssl generate key file](/uploads/1/2/6/1/126130779/960347423.png)
- Mail Tester: https://www.mail-tester.com/
- DKIM: http://www.dkim.org/
- 28 Tips To Avoid Spam Filters When Doing Email Marketing: https://monk.webengage.com/how-to-avoid-spam-filters-when-sending-emails/
- DKIM for Java: https://github.com/globalbus/dkim
- Configuring and Managing SPF, DKIM, and DMARC: https://app.pluralsight.com/library/courses/configuring-managing-spf-dkim-dmarc/table-of-contents
Certificates conversion with OpenSSL
- PEM to PFX (#PKCS12) - Windows
- P7B to PFX (#PKCS12) - Windows
- PFX (#PKCS12) - Windows to PEM - Apache
- P7B (#PKCS7) to PEM
- PEM to P7B (#PKCS7)
Note: certificate.pem is usually the result of a concatenation of your certificate and the certification chain.
Case of Chorus Pro: this service requires the inclusion of the root certificate as well (list of TBS INTERNET root certificates).For example: - Remove a password from a private encrypted key
- DER to PEM - Apache
- PEM - Apache to DER
Openssl Create Key Pair
See also:Openssl Generate Key File
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