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Problem Summary:

I have a paid account on PythonAnywhere and am attempting to set up email sending using Zoho's SMTP server (smtp.zoho.com). However, I'm encountering a "connection refused" error when trying to connect to Zoho's SMTP server from PythonAnywhere. The same code works perfectly in my local environment.

Technical Details:

SMTP Server: smtp.zoho.com

Port: 465 (SSL)

SMTP Connection Code:

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart

# Email Configuration
EMAIL_REMETENTE = "pandora-system@saghaz.com.br"
EMAIL_SENHA = "**************"
EMAIL_SMTP = "smtp.zoho.com"
EMAIL_PORTA = 465

def enviar_email(destinatario, assunto, corpo):
    msg = MIMEMultipart()
    msg['From'] = EMAIL_REMETENTE
    msg['To'] = destinatario
    msg['Subject'] = assunto

    msg.attach(MIMEText(corpo, 'plain'))

    try:
        server = smtplib.SMTP_SSL(EMAIL_SMTP, EMAIL_PORTA)
        server.login(EMAIL_REMETENTE, EMAIL_SENHA)
        server.sendmail(EMAIL_REMETENTE, destinatario, msg.as_string())
        server.quit()
        print(f"Email sent successfully to {destinatario}")
    except Exception as e:
        print(f"Failed to send email. Error: {str(e)}")

Behavior on PythonAnywhere:

When attempting to connect to smtp.zoho.com using port 465 with SSL, I receive a "connection refused" error. I also tried port 587 for TLS but encountered the same issue.

Local Environment:

The same code works correctly in my local environment, sending emails without issues.

Tests Performed:

I created a separate test script to check SMTP connectivity directly:

import smtplib

try:
    server = smtplib.SMTP_SSL('smtp.zoho.com', 465)
    server.login('pandora-system@saghaz.com.br', '**************')
    server.quit()
    print("SMTP connectivity successful.")
except Exception as e:
    print(f"Error connecting to SMTP: {e}")

Running this script on PythonAnywhere resulted in the error message: [Errno 111] Connection refused.

Additional Details:

I checked the list of allowed domains for free accounts and found no restrictions for Zoho. I suspect there may be some block or restriction on PythonAnywhere, even after upgrading to a paid account.

Conclusion: I need assistance in resolving the "connection refused" issue when attempting to use Zoho's SMTP on PythonAnywhere, as the same code works correctly in my local environment.

[formatted by admin]

Free accounts have outbound internet connections restricted by deafult, there are some endpoints (usually API) which we added to our allow-list, but it applies only to the HTTP(S) protocol. Regarding SMTP, we allow only Gmail's servers for free users. I see you've upgraded your account since, so I guess it's now working for you? If not, start a fresh console and test it there.