<dependency>
  <groupId>com.icegreen</groupId>
  <artifactId>greenmail</artifactId>
  <version>1.2</version>
</dependency>

implementation 'com.icegreen:greenmail:1.2'

implementation("com.icegreen:greenmail:1.2")

libraryDependencies += "com.icegreen" % "greenmail" % "1.2"

@Grapes(
  @Grab(group='com.icegreen', module='greenmail', version='1.2')
)

<dependency org="com.icegreen" name="greenmail" rev="1.2" />

[com.icegreen/greenmail "1.2"]

'com.icegreen:greenmail:jar:1.2'