Simple mailer for SendGrid

Edit the existing config.json or create another one. It's pretty self-explanatory

{
    "from": "mail@example.com",
    "fromName": "SenderName",
    "subject": "Test!",
    "attachments": [
        {"type": "image/png", "fileName": "attachments/some_pic.png"},
        {"type": "application/pdf", "fileName": "attachments/some_doc.pdf"}
    ],
    "useBCC": false,
    "bccPerEmail": 1,
    "recipientsFile": "recipients.txt",
    "htmlEmailFile": "email.html"
}

from the address the mail is from

fromName the name the mail is from

subject the subject

attachments array of files to attach. Does not need to be included in the config, but if it is, enter the correct mime type for the file in type and the filename relative to the binary in fileName

useBCC if there are lots of emails to send you can set this to true and it will send bccPerEmail number of emails in the BCC field for each mail. SMTP standard (and SendGrid) does not allow a mail to have only BCC addresses though, so there needs to be at least one address in the to-field. This will be set to the value in from. It is generally not recommended to use this feature as it might decrease deliverability. If this field is set to false the bccPerEmail will have no effect and only one mail will be sent in each call to SendGrid.

recipientsFile newline separated text file with one email per line

htmlEmailFile the email to send. There is currently no support for sending text-based emails or having text fallback.

-config <file> use this config file. Defaults to config.json

-v verbose mode, output the emails being send and show more information about any errors the only the summary at the end.

-help show help

go mod vendor
go build

Or use the precompiled binaries in /bin

Edit email.html to suit your needs. Remember to inline CSS. You can read more here:

https://github.com/leemunroe/responsive-html-email-template

Do whatever you want

email.html is borrowed from https://github.com/leemunroe/responsive-html-email-template