Job searching generates a surprising amount of spam. Here is when using a separate email for job hunting makes sense — and when it would be a serious mistake.
Job hunting involves creating accounts on job boards, uploading your CV to aggregators, registering on recruiter platforms, and emailing hiring managers. Each of those is a different kind of email relationship. The mistake most candidates make is treating all of them the same way — using their primary address for everything and wondering why their inbox fills with recruiter outreach and job board marketing for years after they have found a job.
Not all job-hunting email relationships are equal. Direct communication with potential employers — applications, interview scheduling, offer letters — requires your real address. Recruiter platforms and LinkedIn-style professional networks also warrant your real address. Job board accounts, CV aggregator registrations, and company career page accounts are where a disposable address makes more sense.

The most practical strategy for job hunting is not a temp address but a dedicated secondary address — a free Gmail or Outlook account created specifically for the job search. This gives you the same containment benefit (your primary inbox stays clean) with the ability to create genuine, ongoing relationships with recruiters and employers.

Use a permanent address for job searches, applications, career accounts, and employer communication so notices and recovery remain available. For authorized testing of a career site's email flow, a temporary inbox may be appropriate.