配置 DKIM

如果你不想配置 DKIM，可以跳过这一节。

Creating a DKIM private and public key: Private key as PEM file and base64 encoded txt file:

openssl genrsa 2048 | tee priv_key.pem | openssl rsa -outform der | openssl base64 -A > priv_key.txt

Public key as DNS record:

echo -n "v=DKIM1;p=" > pub_key_record.txt && \
openssl rsa -in priv_key.pem -pubout -outform der | openssl base64 -A >> pub_key_record.txt

在 Cloudflare 的 DNS 记录中添加 TXT 记录

例如:

_dmarc: v=DMARC1; p=none; adkim=r; aspf=r;
mailchannels._domainkey: v=DKIM1; p=<content of the file pub_key_record.txt>

那我在 wrangler.toml 中的配置应该是这样的:

DKIM_SELECTOR = "mailchannels"
DKIM_PRIVATE_KEY = "<priv_key.txt 的内容>"