Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Saat Anda mengirim email menggunakan Mail API, ada beberapa batasan pada header yang dapat digunakan dan jenis file yang dapat dilampirkan.
Header opsional
Email keluar memiliki header yang mencantumkan detail pesan, seperti pengirim, penerima, tanggal, dan subjek. Setiap header memiliki nama dan nilai.
Anda juga dapat menyertakan header berikut dalam email keluar. Untuk tujuan keamanan, header lainnya tidak diizinkan:
In-Reply-To
List-Id
List-Unsubscribe
On-Behalf-Of
References
Resent-Date
Resent-From
Resent-To
Email dengan lampiran
Pesan email keluar dapat berisi lampiran file. Setiap lampiran memiliki nama file dan data file. Data file dapat berasal dari sumber apa pun, seperti file data aplikasi atau datastore.
Ekstensi nama file yang dilarang
Sebagai langkah pengamanan untuk melindungi dari virus, lampiran email tidak boleh menggunakan ekstensi nama file berikut, dan file ZIP tidak boleh berisi file dengan ekstensi nama file berikut:
ade
adp
bat
chm
cmd
com
cpl
exe
hta
ins
isp
jse
lib
mde
msc
msp
mst
pif
scr
sct
shb
sys
vb
vbe
vbs
vxd
wsc
wsf
wsh
Jenis Lampiran dan Multipurpose Internet Mail Extensions (MIME)
Jenis MIME pada lampiran ditentukan dari ekstensi file. Jenis MIME mengidentifikasi jenis konten yang dikirim dan dapat menentukan cara data tersebut ditransfer.
Berikut adalah daftar jenis MIME dan ekstensi nama file yang terkait. Ekstensi ini tidak dibatasi, tetapi jika Anda menggunakan ekstensi yang tidak diketahui, App Engine akan menetapkan jenis MIME application/octet-stream.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],["Terakhir diperbarui pada 2025-09-04 UTC."],[[["\u003cp\u003eThe Mail API allows sending emails with certain restrictions on allowed headers, including \u003ccode\u003eIn-Reply-To\u003c/code\u003e, \u003ccode\u003eList-Id\u003c/code\u003e, \u003ccode\u003eList-Unsubscribe\u003c/code\u003e, \u003ccode\u003eOn-Behalf-Of\u003c/code\u003e, \u003ccode\u003eReferences\u003c/code\u003e, \u003ccode\u003eResent-Date\u003c/code\u003e, \u003ccode\u003eResent-From\u003c/code\u003e, and \u003ccode\u003eResent-To\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eOutgoing emails can have file attachments, but certain filename extensions like \u003ccode\u003e.exe\u003c/code\u003e, \u003ccode\u003e.bat\u003c/code\u003e, and \u003ccode\u003e.vbs\u003c/code\u003e are prohibited for security reasons.\u003c/p\u003e\n"],["\u003cp\u003eThe MIME type of an attachment, which determines how the content is handled, is automatically inferred from the file extension, and if the extension is unknown, it will default to \u003ccode\u003eapplication/octet-stream\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eA wide range of MIME types and their corresponding file extensions are supported, covering various document, audio, image, and video formats.\u003c/p\u003e\n"],["\u003cp\u003eThis API is supported for first generation runtimes, and information on upgrading to second generation runtimes is provided.\u003c/p\u003e\n"]]],[],null,["# Mail with headers or attachments\n\nGo Java PHP Python\n\nWhen you send mail using the [Mail API](/appengine/docs/standard/services/mail),\nthere are some restrictions on the headers that you can use and the types of\nfiles you can attach.\n| This API is supported for first-generation runtimes and can be used when [upgrading to corresponding second-generation runtimes](/appengine/docs/standard/\n|\n| /services/access). If you are updating to the App Engine runtime, refer to the [Upgrade to second-generation runtimes]() page to learn about your migration options for legacy bundled services.\n\nOptional headers\n----------------\n\nAn outgoing email has headers that provide details about the message, such as\nthe sender, recipient, date, and subject. Each header has a name and a value.\nYou can also include the following headers in an outgoing email; for security\npurposes, other headers are not allowed:\n\n- In-Reply-To\n- List-Id\n- List-Unsubscribe\n- On-Behalf-Of\n- References\n- Resent-Date\n- Resent-From\n- Resent-To\n\nMail with attachments\n---------------------\n\nAn outgoing email message can have file attachments. Each attachment has a\nfilename and file data. The file data can come from any source, such as an\napplication data file or the datastore.\n\n### Filename extensions that are prohibited\n\nAs a security measure to protect against viruses, email attachments cannot use\nthe following filename extensions, and ZIP files cannot contain files with the\nfollowing filename extensions:\n\n- ade\n- adp\n- bat\n- chm\n- cmd\n- com\n- cpl\n- exe\n- hta\n- ins\n- isp\n- jse\n- lib\n- mde\n- msc\n- msp\n- mst\n- pif\n- scr\n- sct\n- shb\n- sys\n- vb\n- vbe\n- vbs\n- vxd\n- wsc\n- wsf\n- wsh\n\n### Attachments and Multipurpose Internet Mail Extensions (MIME) types\n\nThe MIME type of an attachment is determined from the file's extension. The MIME\ntype identifies the type of content that is being sent, and can determine how\nthat data is transferred.\n\nThe following is a list of MIME types and their corresponding filename\nextensions. You are not limited to these extensions, but if you use an unknown\nextension, App Engine will assign it the MIME type `application/octet-stream`."]]
