First, read the English article below.

If you've received a job offer, the time has come to negotiate your salary before you sign. Doing this via email is acceptable if you and your potential employer have previously been interacting through this medium, especially if the job offer itself was extended in an email. Using email gives you time to craft a coherent case for your counteroffer without becoming stressed and flustered. There are some disadvantages to negotiating salary via email. Some experts believe that negotiation is better done face-to-face, and that an email can read more like a list of demands than a dialogue between employer and employee. You should pick a subject line that is generic but still lets the recipient know that the message relates to the job. You might consider including your name and a reference to your "thoughts on the offer." Don't use a subject line such as "Salary negotiation." This is too blunt. You don't want to come across as pushy or entitled. Always use a greeting in your email correspondence with your potential employer, the way you would if you were writing a letter. The correct greeting depends on the context of your previous interactions with the recipient.  If your communications have been formal so far, address the email with "Dear" followed by the recipient's prefix (Dr., Mr., Ms., etc) and last name, then a comma and a line break before beginning your message.  If you're unsure of your recipient's preferred prefix, for example Mrs. or Ms., simply write out their entire name with no prefix.  If your interactions have been more informal, consider replacing "Dear" with "Hello" or "hi" and using the recipient's first name. When negotiating your salary, you want to come across as genuinely grateful for the job offer and enthusiastic about the position. Start your email by thanking the recipient and stating that you are excited about the opportunity. Remember to always use complete, grammatically-correct sentences and to proofread your email for typos. You want to convey professionalism. Never use emojis or... 

Now, please write a short abstract for it in Indonesian. Abstract:
Negosiasikan gaji lewat surel untuk memastikan pesan Anda jelas. Hindari penyebutan "gaji" dalam subjek surel. Gunakan salam pembuka yang pantas. Gunakan nada bahasa sopan dan hormat. Usahakan untuk tegas, tetapi tidak agresif saat menyatakan usul balasan. Dukung usul balasan dengan riset. Tutup surel dengan hormat. Bersiaplah menerima usulan lain.