Nail varnish, perfumes and other items will be able to be posted to addresses in the UK from next week.
A review by the Royal Mail of its rules means that consumers will from July 15 be able to post toiletry and medicinal aerosols, nail varnishes, perfumes and aftershaves, which are currently prohibited by dangerous goods regulations.
However, to post these items customers will need to use the Post Office counter service.
They can continue to post electronic items sent with or containing lithium batteries, including mobile phones, within the UK. But these are subject to new packaging and quantity requirements and should be done over the counter.
The Royal Mail said it would no longer accept prepaid polylope envelopes commonly used by mobile phone recycling companies.
The changes follow an agreement between the Royal Mail, the Civil Aviation Authority (CAA), Department for Transport and the Maritime and Coastguard Agency and affects personal customers and smaller non-account business customers.
Posting aerosols, perfumes and aftershaves, nail varnish and lithium batteries not installed in a device will continue to be banned from international mail services.
Mike Newnham, Royal Mail's chief customer officer, said: "Royal Mail has agreed updated procedures with the Civil Aviation Authority, Department for Transport and the Maritime and Coastguard Agency for sending specific consumer items in the mail.
"This will limit the risk posed by those items and ensure they can be transported safely through the UK postal network. Royal Mail and Post Office are working with customers to ensure they are given the appropriate advice on the updated arrangements."
Geoff Leach, manager of the CAA's dangerous goods office, added: "UK and international mail is carried by air including on-board passenger aircraft. The CAA has been working closely with Royal Mail to ensure that specific low-risk items can be transported safely through the UK postal system. Royal Mail has developed an approach to ensure its customers can implement any necessary changes to their postings as smoothly as possible."