Getting "SMTPServerDisconnected: Connection unexpectedly closed: [Errno 104] Connection reset by peer" errors when using django.core.mail.send_mail in the loop

[Haomin Zhang]

Create a command like below, which send a mail to the user if the date meet the requirement:

class Command(BaseCommand):

    help= 'Send mail to user regularly if there have contacts needs reminder'

    

    def handle(self, *args, **options):

        now = timezone.now().date()

        backlogs = Backlog.objects.all()

        for backlog in backlogs.iterator():

            start_date = backlog.start_date

            end_date = backlog.end_date

            if start_date <= now and now < end_date:

                user = backlog.user

                user_email = user.email

                user_name = user.username

                if user_email is not None:

                    mail_title = u'Contracts need to be handling.'

                    mail_content = u"Dear:%s，you have messages" % user_name

                    link = u"http://xx.xxx.xx.xxx/contract-info/"

                    mail_content += link;

                    mail_from = 'from_...@xx.com'

                    mail_to = [user_email]

                    send_mail(mail_title,

                          mail_content,

                          mail_from,

                          mail_to)

This command can run well in local server. But when I launch it on the VPS and if call send_mail more than once, below mesasge appear:

"SMTPServerDisconnected: Connection unexpectedly closed: [Errno 104] Connection reset by peer"

But if only one backlog been filtered and only call once send_mail, it works well.

Does anybody met the issue before? thanks in advance!

-Haomin

[Asif Khan]

I am facing similar error while I am rendering html template to PDF by using xhtml2pdf. Same when my template have small number of rows it works perfect to render as pdf but when my result fetch mutiple table rows it start processing and after couple of duration give error [Errno 104] Connection reset by peer.