Retry Timing

Sets how many times this server will retry sending failed messages, and the interval in minutes between these retries. Unless explicitly set, the default retry times are "30,720", meaning the first retry will occur 30 minutes after the first attempt, the second retry after 12 hours, and that a total of 2
retries will be attempted. Retry intervals should be separated by commas:

30,60,90

Each interval measures the time, in minutes, between the previous try and the next try. The smallest acceptable retry interval is five minutes and the largest acceptable retry interval is 1440 minutes (24 hours). Retry intervals which are not within the acceptable range will be ignored.

For example, if you want to establish a retry schedule of 30 minutes, two hours, eight hours, and 24 hours, you would enter the following values:

30,120,480,1440

Please note that the retry interval is measured in relation to the time of the last retry, not the time the message was originally sent.

For most lists, three to five retries is more than enough. Also, it is a good idea to schedule one retry a full 24 hours after the message originally went out, to guard against temporary network outages. If you are running ListManager for the first time with lists that have many bad email addresses, you may want to have only one retry to make delivery quicker. Once members with bad email addresses have been put on hold and purged (based on your Error Mail Handling settings in List Admin), your mailing speeds will increase and you may reset the retry timing to less aggressive settings.

This setting can also be set using the retrytiming command; see Setting Server Options for more information.