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Did you mean: Email bouncing back

Team Player
Message 8 of 8

I can send from my email account but when someone tries to reply it bounces back, regardless of who I send it to.  I am sending and receiving using Gmail


This is the bounce back message - 


Message blocked

Your message to .......has been blocked. See technical
details below for more information.
The response was:

550 5.7.26 Unauthenticated email from is not accepted due
to domain's DMARC policy. Please contact the administrator of domain if this was a legitimate mail. Please visit to learn about the
DMARC initiative. q48-20020a4a88f3000000b0035e5e3c0a06sor1423934ooh.19
- gsmtp


Message 1 of 8

Great support as always here from Gondola. I've marked the  post as the best answer. 



Please log in to My Account if you need to view or pay your bill, manage boosts and track your usage. From My Account you can also check your connection and test your line for any issues in the Service Centre.

Message 2 of 8

Yes and it's been working fine. Bizarrely the settings have gone back to the previous ones without any intervention from me. I only use the lineone account for things I subscribed to or connected with man years ago.  I am going to wean everyone off lineone, it's had its day.


Thanks, I have bookmarked that page.


Message 3 of 8

Did we not discuss email settings over a year ago?   Previous topic


The generic email settings have been published on TalkTalk's Help page for years. As well as giving you advice did I not link to the email settings for IMAP and POP3 accounts?


You might like to bookmark the TalkTalk Mail Support Hub as this is your go to resource for information, guides and Community support for TalkTalk Consumer home broadband and MailPlus subscribers.


Select here:
TalkTalk Mail Support


TalkTalk Mail help

Email settings - IMAP & POP3


GondolaVolunteer 2017-2022

  Like (below) to support me . . . Mark as solved (below)  Accept as Solution


Team Player
Message 4 of 8

Simply not true. Lineone have NEVER asked me to change settings, and been a customer for15+years.  Always felt like a second class customer since the takeover.


Message 5 of 8

The settings haven't changed for many years and were consolidated for all mail accounts from 2018.


Pleased that you've confirmed everything is working.

GondolaVolunteer 2017-2022

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Team Player
Message 6 of 8

That seems to work. Shame that Talktalk did not consider telling us customers that the settings had changed.


Community Star
Message 7 of 8

Hi carrotmuseum1 


The bounceback error message is from the Gmail inbound servers that are seeing a email address sent by the Gmail outgoing mail servers. Lineone mail needs to be sent by the TalkTalk Mail servers to get the benefit of the DMARC policy set by TalkTalk. TalkTalk does not authenticate sending by Gmail servers.


You must therefore send from TalkTalk Mail servers directly by signing in to your TalkTalk Mail account OR by setting up in your Gmail Accounts and Import settings a Send mail as facility that will send mail from the TalkTalk servers:


Mail is sent through:

Secured connection on port 587 using TLS

GondolaVolunteer 2017-2022

  Like (below) to support me . . . Mark as solved (below)  Accept as Solution