when save new email domain zoho.com.cn , the page is frozen and finally returned requested time out message, and the email domain can not be saved at all! per further study and testing, I got the following finding and workaround to fix my problem
Finding:
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on my aliyun cloud, for both my 2 email domains zoho.com.cn and 163.com, smtplib.SMTP(host, port) always no responding or error, smtplib.SMTP_SSL(host, 465) works instead
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in frappe/frappe/email/smtp.py, the connection made to email domain is by the following 2 lines
server =smtplib.SMTP()
server.starttls() // this line even does not work for smtplib.SMTP_SSL(), this line is not needed at all
my workaround solution:
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change the smtp.py file as following(from line 180)
if self.use_tls:
self._sess = smtplib.SMTP_SSL((self.server or “”).encode(‘utf-8’),
cint(self.port) or None)
if not self._sess:
err_msg = _(‘Could not connect to outgoing email server’)
frappe.msgprint(err_msg)
raise frappe.OutgoingEmailError(err_msg)#if self.use_tls: # self._sess.ehlo() # self._sess.starttls() # self._sess.ehlo() -
make sure for the new domain record, make sure use TLS checked, input port number 465.
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setup a new email account which activated outgoing and link to the above mentioned email domain
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in the mail client setting (e.g login to www.zoho.com.cn) activate POP3/IMAP/SMTP