Why does my html email appear differently when sent by AWS SES?-CodePudding

The

And here is what I'm getting from the different email senders:

These slight differences are causing the email sent by SES to appear incorrectly. Specifically, some of the media queries aren't working(while some still do), and there is additional spacing at the top.

In the header of the emails, both say they are being encoded by UTF-8, although the way it's phrased is slightly different.

Postdrop appears like this:

Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

and SES appears like this:

Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Not sure if that would affect anything. What is causing this issue, and how do I fix it?

Edit

Here is the code for the Lambda function that tells SES to send the email, but some of the identifying stuff(specific email addresses, amazon region, and file structure) have been removed just for safety:

import boto3 import logging import os import sys from emailbody import body from emailbodytext import bodytext from botocore.exceptions import ClientError def send_email(recipients): SENDER = "" # must be verified in AWS SES Email RECIPIENTS = recipients # must be verified in AWS SES Email AWS_REGION = "" # Create a new SES resource and specify a region. client = boto3.client('ses',region_name=AWS_REGION) # Try to send the email. try: #Provide the contents of the email. response = client.send_templated_email( Destination={ 'ToAddresses': RECIPIENTS, }, Template='TemplateName', TemplateData = "{}", Source=SENDER ) # Display an error if something goes wrong. except ClientError as e: print(e.response['Error']['Message']) else: print("Email sent! Message ID:"), print(response['MessageId']) def delete_email_template(templateToDelete): AWS_REGION = "" # Create a new SES resource and specify a region. client = boto3.client('ses',region_name=AWS_REGION) # Try to get the email template. try: #Provide the contents of the email. response = client.delete_template( TemplateName=templateToDelete ) return response # Display an error if something goes wrong. except ClientError as e: print(e.response['Error']['Message']) else: print(response['MessageId']) def create_email_template(): AWS_REGION = "" #The name for the template TEMPLATENAME = "Test" # The subject line for the email. SUBJECT = "Test Email" #The email body EMAILBODY = body #The email text BODYTEXT = bodytext # Create a new SES resource and specify a region. client = boto3.client('ses',region_name=AWS_REGION) #Provide the contents of the email. response = client.create_template( Template={ 'TemplateName': TEMPLATENAME, 'SubjectPart': SUBJECT, 'TextPart': BODYTEXT, 'HtmlPart': EMAILBODY } ) def lambda_handler(event, context): emails = ['', ''] create_email_template() send_email(emails) delete_email_template("Test")

CodePudding user response：

What you see is the quoted-printable encoding of your email. This encoding will convert any non allowed character to a =..=... hex sequence. As described here. This encoding gets then parsed by the final mail client (or probably by a server in case of web mail like Gmail) and displayed to the end reader. As discussed here this parsing process is not very reliable.

=E2=80=8B is actually the encoding of a zero width space. So you have junk (invisible spaces) inside your email. Postdrop is probably just stripping them where SES not.

Regarding the solution I would advise against non ASCII characters in your email, or at least inside the CSS portion of it as if would make the parsing very unpredictable. Otherwise you may try with other Content-Transfer-Encodings.

CodePudding user response：

You need to minify that HTML email template. There are some tools for this. Even though both are sending your email, AWS is just messing it up in the process of trying to make adjustments.... Emails are very sensitive to charecter encoding. Most HTML template creating tools have a dev testing and then a build function that minifies and a bunch of other changes to the way CSS is written, even some make it all inline. That is not a valid HTML/CSS template for email.

Also not sure UTF-8 is what you want: Encoding (string) --

The encoding: UTF-8 but may not preserve all special characters when a message was encoded with a different encoding format. Base64 preserves all special characters. The default value is UTF-8.