die Weiterleitung
forwarding
The sending of a received message, call, or data to another recipient or another address.
Ich habe die automatische Weiterleitung für meine E-Mails eingerichtet.
I set up automatic forwarding for my emails.

forwarding
Loading your saved state.
forwarding
The sending of a received message, call, or data to another recipient or another address.
Ich habe die automatische Weiterleitung für meine E-Mails eingerichtet.
I set up automatic forwarding for my emails.

The word is derived from the separable verb 'weiterleiten' (to forward). The ending '-ung' turns the verb into a feminine noun that describes the process or result of the action.
Das Verb für diese Aktion ist „weiterleiten“.
The verb for this action is 'weiterleiten' (to forward).
The structure is often 'die Weiterleitung von [etwas] an [jemanden/eine Stelle]' (the forwarding of [something] to [someone/a department]). The preposition 'von' indicates what is being forwarded, and 'an' names the new recipient.
Die Weiterleitung von vertraulichen Daten an Dritte ist verboten.
The forwarding of confidential data to third parties is prohibited.
In this meaning, you will often find the word in a technical or digital context. It is usually about the forwarding of emails, calls, messages, or data packets.
Die Weiterleitung meines Anrufs an den Kundenservice hat lange gedauert.
The forwarding of my call to customer service took a long time.
This meaning is typically used in offices, administration, or organizations. Here it is about the forwarding of inquiries, documents, tasks, or complaints.
Ich kümmere mich um die Weiterleitung Ihrer Beschwerde an die Geschäftsführung.
I will take care of forwarding your complaint to management.
mediation / placement
'die Vermittlung' and 'die Weiterleitung' can both have to do with something or someone reaching the right place. However, 'Vermittlung' often means that a third person actively helps bring two sides together, for example with an apartment, a job, or a conflict. In the older telephone meaning, 'Vermittlung' can also be a switchboard that connects calls. 'Weiterleitung', on the other hand, more often means that a message, call, document, or task is sent or passed on to someone else. Learners may confuse the words because both occur in offices and phone calls. For people and agreements, 'Vermittlung' often fits; for emails, calls, and documents, 'Weiterleitung' usually fits.

Heute dauert die Weiterleitung der E-Mail an die Personalabteilung etwas länger.
Today, forwarding the email to the HR department is taking a little longer.
Durch die Vermittlung einer Kollegin fand Lisa schnell eine neue Wohnung.
Through the mediation of a colleague, Lisa quickly found a new apartment.