How many recipients can I send an email to?

[cambsno]

I am looking to send an email to approx. 50 people. Can I put all email addresses into BCC field and send? I think I remember reading if there are too many names it can get classed as spam?

Using Mail on the Mac.

Oh, and can I just highlight the addresses in excel and paste to BCC ?

 

[ohood]

That should all be fine. Depends on your ISP and the recipient's though. Do it in batches (~10 per time) if you're unsure.

 

[mattyh]

If you want to avoid being seen as a spammer, you could use mailmonkey - free to use, and you won't run into problems with your ISP / web host

 

[onomatopoeia]

The SMTP protocol defined in RFC 821 and successors defines no limit on the number of recipients for a single message.

Rubbish ISPs may impose a limit on the number of RCPT commands following a MAIL command. Sadly, rubbish is the standard of most "mass market" ISPs. On BT Internet the limit is around 25 recipients I am told. If true, that's appalling.

If your ISP doesn't block or proxy port 25 you can relay yourself - I use exim which is free and open source.

 

[cambsno]

Just did 5 batches of 10.