Maximum number of addresses in one email?

For iCloud email:

Mailbox size and message sending limits in iCloud - Apple Support

For other mail providers, you will have to check with them on their sending limits.

I had a similar issue and, athough I could not find a definitive answer, the situation seems to be that most email providers set a limit to the number of addresses allowed on an email; this is probably a measure to impede scammers. The providers also keep the limit to themselves and perhaps vary it, again as an anti-spam measure. The solution I found was to use a specialist email marketing tool as this allows a very large number of addresses and gives them pretty good privacy. it also provides statistics on, for example, the number of emails opened and the number of links clicked on. I am not sure if forum rules allow me to state the tool I use but it is probably the most popular one and is free unless you are a very heavy and frequent user.

You can google any email provider for that info. They will give you the message limits per day (or hour), number of recipients per message, etc. You just have to look.

If you want to send to that many recipients at one time, or a lot of emails in one day, then you will probably need to pay for that service.

There is no tool that will by pass the sending limits that your provider sets, unless it routes your messages through a different server than you provider uses.

1. I would be interested in your Google result for btinternet.com - the biggest email provider in the UK.

2. Email marketing tools do not necessarily pass through one's personal email provider - they are web-based.

All emails including web based have to pass through an email server. The tools you refer to may pass through a different server using the name of your provider.

If you can't find results by searching the internet, then you may need to call your provider and ask.

You wrote "You can google any email provider for that info. They will give you the message limits per day (or hour), number of recipients per message, etc. You just have to look". I tried to indicate to you that this is patently not the case, and it is no good calling one's provider if they are not prepared to divulge the information. In the case of btinternet.com, the internet is awash with comments to this effect, and a quick Google suggests that they are not alone in this.

Web-based email marketing tools do not necessarily have to pass through the email server that your ISP provides. As long as you have an internet connection of some sort, you can send out messages via, for example, Mailchimp. I am not even certain that having a personal ISP is essential.

My point to the OP was that it is perfectly possible to send messages to a very large number of addressees if an email marketing tool like Mailchimp is used. This one is free for up to 2000 addressees and 12000 emails per month, is simple to use and is independent of any limits set by one's ISP. It requires an email address to set up an account but a free address such as gmail suffices. I have no connection with Mailchimp but, on the face of it, it could be the answer to the OP's problem.

Glad you got it sorted out. For all Time Warner restrictions: https://www.timewarnercable.com/en/support/faqs/faqs-internet/e-mailacco/are-the re-any-email-restrictio.html

Since you have more than 1000 addresses to send to, bratman91's suggestion of Mailchimp may be the way to go.

Good Luck

I shouldn't have implied that every provider's info could be found through google. The info can be found by searching for most major providers here in the US. As far as your provider, it does appear that it's a secret with them. I can't imagine why they won't provide you with that info if you contact them.

Mail providers don't care if you are using a mail client like apple Mail or a webmail site through a browser. Message limits a mail provider set apply for either webmail or mail applications as they still have to go through the email servers. For the web-based email or email tools, I've already stated that it's possible for someone like Mailchimp to use your email address to send through their servers. What the tools like Mailchimp can't do is change your providers sending limits. Instead, they are sending through their servers and they control how many emails and recipients you can send to.

I don't know for certain why BT and other UK ISPs are coy about addressee limits but if it helps to reduce spamming/scamming, then I'm all for it. All the same, I can't see that the UK is any more the target for spamming/scamming than the US or any other country so, if it is an anti-fraud measure, I would expect ISPs almost universally to adopt much the same policies.

Ref your second paragraph, I am in complete agreement.

As a general comment, there may be a reason to avoid doing this using your own mail server. Apart from the fact that your own server may limit the quantities doing this on your own main email account and/or server could result in your account or domain being flagged as a spammer and therefore even ordinary emails from you then being blocked more often by other peoples spam filters.

I therefore always encourage the use of a service like MailChimp as they send the emails via their own servers and this reduces the chance of your own being blacklisted.

One of the criteria for marking an email as spam is the number of Bcc recipients, the higher the number the more likely it is to be treated as spam.