# Mass mailing best practices **URL:** \ **Category:** Rails\ **Created:** [April 8, 2006, 10:29pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274 "2006-04-08T22:29:04Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 8, 2006, 10:29pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/1 "2006-04-08T22:29:04Z")
I’m building a feature for my app which allows the admin to compose an email and send it to a list of registered users (~1000). What is the best method for doing this? Should I create one email and BCC all the recipients? Is there a limit to how many recipients can be included in one email? or Should I send the same email to individual users? In the past I’ve had problems with legitimate emails being flagged as spam (usually on hotmail). Is one method more likely to be flagged as spam then the other? The app is hosted on Textdrive. ---
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 8, 2006, 10:41pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/2 "2006-04-08T22:41:12Z")
> Mass mailing best practices jumbo shrimp military intelligence Sorry couldn’t resist. On 4/8/06, Hammed M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Should I send the same email to individual users? I think this has the best chance to get past junk mail flags. Only one recipient per email. It might look like a hand written email to the junk mail filter. Peter ---
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 8, 2006, 11:14pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/3 "2006-04-08T23:14:40Z")
> jumbo shrimp > military intelligence > > Sorry couldn’t resist. Yeah. I thought the subject might stand out 🙂 > > Should I send the same email to individual users? > > I think this has the best chance to get past junk mail flags. Only one > recipient per email. It might look like a hand written email to the > junk mail filter. Makes sense. I’m thinking of adding recipients to a table and then sending them one by one. Thanks ---
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 8, 2006, 11:39pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/4 "2006-04-08T23:39:04Z")
Charlie, My app is hosted at Textdrive and shares an IP. [euforea.com](http://euforea.com) =\> 207.7.108.149 nslookup 207.7.108.149 =\> [pendrell.textdrive.com](http://pendrell.textdrive.com) Are mails send from a ???@euforea.com likely to be flagged as spam in this case? Is a dedicated ip a solution? ---
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 9, 2006, 6:00pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/5 "2006-04-09T18:00:31Z")
The most important factor is the ability for the recipients servers to do a reverse lookup on the senders hostname. I send out a fair amount of legitimate mailings to clients. There were alot of clients who weren’t recieving the mail I was sending because my mailserver was on an internal ip with a private host name. Once I changed it so that the a reverse dns lookup could be perfored, the mail reached the client without being marked as spam. Hammed M. wrote: > Charlie, > > My app is hosted at Textdrive and shares an IP. > > [euforea.com](http://euforea.com) =\> 207.7.108.149 > nslookup 207.7.108.149 =\> [pendrell.textdrive.com](http://pendrell.textdrive.com) > > Are mails send from a ???@euforea.com likely to be flagged as spam in > this case? Is a dedicated ip a solution? ---
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 8, 2006, 11:20pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/6 "2006-04-08T23:20:13Z")
You’re much more likely to get marked as spam when you send from a dynamic ip address. Also make sure you can perfrom a reverse dns lookup on your host name. AOL will block all email (they won’t even reach the spam filter) if your hostname can be looked up. Hammed M. wrote: > > jumbo shrimp > > military intelligence > > > > Sorry couldn’t resist. > > Yeah. I thought the subject might stand out 🙂 > > > > Should I send the same email to individual users? > > > > I think this has the best chance to get past junk mail flags. Only one > > recipient per email. It might look like a hand written email to the > > junk mail filter. > > Makes sense. I’m thinking of adding recipients to a table and then > sending them one by one. > > Thanks ---
**Author:** ![Hammed\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@Hammed\_M](https://www.ruby-forum.com/u/Hammed_M)\ **Post date:** [April 9, 2006, 10:29pm UTC](https://www.ruby-forum.com/t/mass-mailing-best-practices/57274/7 "2006-04-09T22:29:45Z")
As far as I’m concerned, the best practice with mass mailings is not to do them – **at all** – **ever**. Rather, have a **separate** mailing list(s) associated with the site/business/product/whatever, managed with a mailing list manager. You need to get **explicit** permission for email, rather than assuming that anyone who gives you his email address desires every piece of email you could possibly send him. Having said that, is there a Rails-based mailing list manager already built, so a Rails site/application doesn’t have to use one written in a foreign language, such as Python? Hammed M. wrote: > Should I send the same email to individual users? – M. Edward (Ed) Borasky > **[世界杯竞猜彩票-世界杯官网竞猜（集团）有限公司](http://www.linuxcapacityplanning.com/)** > > 世界杯竞猜彩票一直以来遵守商业道德，世界杯官网竞猜坚持诚信为本，保证诚实经营。世界杯竞猜彩票先后成为安徽省电子商务协会理事单位、安徽省网商协会会员单位、合肥市电子商务协会理事单位、合肥市服务外包行业协会会员单位、安徽省云计算产业促进会会员单位。世界杯官网竞猜一直保持良好的技术及服务态度，更好地为客户服务。