OZG-5322 [test] adjust timeout

vorgang-manager-server/src/test/java/de/ozgcloud/nachrichten/postfach/PostfachMailITCase.java

@@ -150,7 +150,7 @@ class PostfachMailITCase {
 				assertThat(mails.get(0).getCreatedAt()).isNotNull();
 				assertThat(mails.get(0).getDirection()).isEqualTo(GrpcDirection.OUT);
 				assertThat(mails.get(0).getSentAt()).isNotNull();
-				assertThat(ZonedDateTime.parse(mails.get(0).getSentAt())).isCloseTo(ZonedDateTime.now(), within(15, ChronoUnit.SECONDS));
+				assertThat(ZonedDateTime.parse(mails.get(0).getSentAt())).isCloseTo(ZonedDateTime.now(), within(61, ChronoUnit.SECONDS));
 				assertThat(mails.get(0).getSentSuccessful()).isTrue();
 			}
 		}