fix: Sequential mail sending aborts after one mail is rejected (#5179)

* fix

* changeset

* Update packages/mail-client/src/mail-client.ts

* add test

* Changes from lint:fix

---------

Co-authored-by: cloud-sdk-js <[email protected]>

Author: deekshas8

.changeset/quick-chefs-invent.md

@@ -0,0 +1,5 @@
+---
+'@sap-cloud-sdk/mail-client': patch
+---
+
+[Fixed Issue] Fix email sending functionality to ensure that emails are sent to all valid addresses. Previously, if an email failed, all subsequent emails were not sent.