We want to ensure your post gets there as quickly as possible, or more importantly on the day you are planning your campaign to start. Did you know that the colour, size and the weight of your envelope can dictate how soon your mail gets to its destination?

If you are sending a standard envelope or a large envelope and we make sure you stick to the guidelines on size, weight, colour and paper thickness.

We work closely with our customers to advise you, on the best practice following the An Post guidelines to speed up your delivery. A few simple rules will pave the way to faster deliveries and better service all round.

An Post, in the Dublin Mail Centre uses OCR (Optical Character Recognition) – in the mail processing equipment which can sort through 40,000 pieces of mail per hour. All our processes posting are injected Direct to the Dublin Centre for processing.

 To get the most out of OCR we follow some simple steps:

Font Type

The recommended address font is Arial, black text on white. Other fonts that can be used include Century, Courier, Letter Gothic and Helvetica.

You should never use colour, italics, underlining or punctuation in an address.


OCR recognises cream and pastel coloured envelopes. Dark backgrounds such as red, yellow, orange, blue or green are unreadable and should not be used.

Font Size

The recommended fonts sizes are 11pt, 12pt and 13pt are perfect with a pitch value of 10, 11 or 12 (in other words letters not too close together).


Address lines should ideally have a spacing of 3mm and a maximum spacing of 4mm in between each line of address. There should be a maximum of 32 characters per line (excluding spaces).

Security Patterns

Avoid using security patterns or embossing in either the address block or postage area.


Check contents are not loose in the envelope, otherwise the address can disappear from the window.

If you are posting keys, coins, metal objects, loose materials or thick card it is best to use a jiffy or padded envelope. Staples, metal or plastic clips cannot be used on the envelope itself.

If you’re posting a large amount of mail, we ensure you can avail of the volume discounts you’re entitled to.

We also have all the supplies of trays, cages, labels and correct labelling to avoid any delay.

Talk To Us

We look forward to discussing the individual needs of your project. We would be delighted to draw up a quote for your all your business, mailing and fulfilment needs.

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