topic Re: Sending mass email in Broadband & Landline

Sending mass email

RonP2 — Thu, 20 Aug 2026 09:20:25 GMT

I have recently switched from PlusNet to EE for my broadband, and all seems to be working fine. However, I do have one problem which may or may not be related to the switch. I am a committee member of a local club and I regularly send out mass emails to about 500 members (club news, monthly magazine, etc.) I use Gmail for this and, prior to the switch, everything was fine. But since I set up the new EE router, when I carry out a mass email operation I receive notifications from the Mail Delivery Subsystem telling me that several of the messages have not been delivered. A typical such message is "BST, policy (3.2.1.1) - Your message looks like SPAM or has been reported as SPAM".

All the non-delivered messages are to @btinternet.com addresses, although some to these addresses do go through. Very odd! Could this be related to my recent change to EE? If anyone could suggest a solution I would be very grateful.

Re: Sending mass email

Peter_W — Thu, 20 Aug 2026 12:41:14 GMT

Welcome to the Community, @RonP2

I've not known of any issues with EE connections blocking outgoing mail.

When you mention using Gmail, is the address you're sending from a consumer @Gmail.com domain, or do you have your own separate domain?

Peter

Re: Sending mass email

XRaySpeX — Thu, 20 Aug 2026 14:00:12 GMT

Are you using GMail via its online Webmail or using a mail app on your device?

If the latter, it is possible that your current dynamic public IP has been compromised by a previous user with that IP by sending spam & blacklisted by various DNSBL sites. Check your current public IP with IP Blacklist Check - Email/Domain/IP Blacklist Checker

Try rebooting router until you are given a new public IP.

Re: Sending mass email

RonP2 — Thu, 20 Aug 2026 16:00:26 GMT

Hi Peter

Thanks for getting back to me. I'm sending from a consumer address, using the Gmail online Webmail.

Re: Sending mass email

RonP2 — Thu, 20 Aug 2026 16:02:39 GMT

Hi. Thanks for the reply. I am using GMail via its online Webmail.

Re: Sending mass email

Peter_W — Thu, 20 Aug 2026 16:10:38 GMT

Cheers @RonP2 😊

I can't say for sure what Google's terms of service are for Gmail, but sometimes they do have stipulations in place around bulk emailing.

As BT internet seems to be affected especially here though, I am leaning towards your dynamic IP being flagged by a spam filter like @XRaySpeX has mentioned above.

I'd recommend leaving your Hub powered off for at least 30 minutes, and this should assign you a fresh IP.

Peter

Re: Sending mass email

XRaySpeX — Thu, 20 Aug 2026 16:29:29 GMT

@Peter_W : When you are using Webmail I'm not sure whether the DNSBLs sees your own IP but only that of the Webmail site.

Re: Sending mass email

Peter_W — Thu, 20 Aug 2026 16:28:17 GMT

@XRaySpeX I'm not sure on that either, but I do know BT mail actively blocks emails from sources it determines may be malicious.

If the steps above don't make a difference, there are questions we can potentially ask around if something is happening at the receiver's end.

Peter

Re: Sending mass email

bobpullen — Fri, 21 Aug 2026 07:29:28 GMT

The IP assigned to the EE connection is highly unlikely to have any bearing on things if it's GMail's web interface that's being used. The receiving BT servers would typically be looking at the sending IP of GMail's Webmail platform rather than the IP address of @RonP2's Internet.

That said, sending x500 recipient emails using GMail's (presumably free/consumer?) service is not the best practice; it's something that should ideally be done using mailing lists or a dedicated mass mailing service.

Re: Sending mass email

FoxRadio — Fri, 21 Aug 2026 10:20:18 GMT

@RonP2 For those that don't get delivered during the bulk sending, do they subsequently get delivered if you send them individually?

Perhaps next time you could try sending in 2 lots of 250?

Re: Sending mass email

RonP2 — Fri, 21 Aug 2026 12:42:29 GMT

Hi there

Thanks for your response. I've not tried sending individually yet, but I
will do and let you know. Incidentally, I already send in batches of 250.

I always send individual messages via Outlook but I found that sending these
mass emails always triggered too many undeliverable messages. However, when
using the Gmail webmail site instead, I never got a reject until I changed
my broadband to EE last week.

Regards

Ron (RonP2)